diff --git a/app/build.gradle b/app/build.gradle
index 5eb89010..75f2ccc4 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -66,6 +66,7 @@ if (project.hasProperty('sign')) {
 }
 
 dependencies {
+    def markwon_version = "4.6.2"
     implementation project(':client')
     implementation 'androidx.appcompat:appcompat:1.6.1'
     implementation 'androidx.core:core-splashscreen:1.0.1'
@@ -76,12 +77,12 @@ dependencies {
     implementation 'androidx.preference:preference-ktx:1.2.1'
 
     implementation 'com.github.cyb3rko:QuickPermissions-Kotlin:1.1.3'
-    implementation 'com.squareup.picasso:picasso:2.71828'
-    implementation 'io.noties.markwon:core:4.6.2'
-    implementation 'io.noties.markwon:image-picasso:4.6.2'
-    implementation 'io.noties.markwon:image:4.6.2'
-    implementation 'io.noties.markwon:ext-tables:4.6.2'
-    implementation 'io.noties.markwon:ext-strikethrough:4.6.2'
+    implementation 'io.coil-kt:coil:2.6.0'
+    implementation "io.noties.markwon:core:$markwon_version"
+    implementation "io.noties.markwon:image-coil:$markwon_version"
+    implementation "io.noties.markwon:image:$markwon_version"
+    implementation "io.noties.markwon:ext-tables:$markwon_version"
+    implementation "io.noties.markwon:ext-strikethrough:$markwon_version"
 
     implementation 'org.tinylog:tinylog-api-kotlin:2.6.2'
     implementation 'org.tinylog:tinylog-impl:2.6.2'
diff --git a/app/src/main/kotlin/com/github/gotify/CoilHandler.kt b/app/src/main/kotlin/com/github/gotify/CoilHandler.kt
new file mode 100644
index 00000000..26ff360d
--- /dev/null
+++ b/app/src/main/kotlin/com/github/gotify/CoilHandler.kt
@@ -0,0 +1,67 @@
+package com.github.gotify
+
+import android.content.Context
+import android.graphics.Bitmap
+import android.graphics.BitmapFactory
+import android.graphics.drawable.BitmapDrawable
+import coil.ImageLoader
+import coil.annotation.ExperimentalCoilApi
+import coil.disk.DiskCache
+import coil.executeBlocking
+import coil.request.ImageRequest
+import com.github.gotify.api.CertUtils
+import com.github.gotify.client.model.Application
+import java.io.IOException
+import okhttp3.OkHttpClient
+import org.tinylog.kotlin.Logger
+
+internal class CoilHandler(private val context: Context, private val settings: Settings) {
+    private val imageLoader = makeImageLoader()
+
+    private fun makeImageLoader(): ImageLoader {
+        val builder = OkHttpClient.Builder()
+        CertUtils.applySslSettings(builder, settings.sslSettings())
+        return ImageLoader.Builder(context)
+            .okHttpClient(builder.build())
+            .diskCache {
+                DiskCache.Builder()
+                    .directory(context.cacheDir.resolve("coil-cache"))
+                    .build()
+            }
+            .build()
+    }
+
+    @Throws(IOException::class)
+    fun getImageFromUrl(url: String?): Bitmap {
+        val request = ImageRequest.Builder(context)
+            .data(url)
+            .build()
+        return (imageLoader.executeBlocking(request).drawable as BitmapDrawable).bitmap
+    }
+
+    fun getIcon(app: Application?): Bitmap {
+        if (app == null) {
+            return BitmapFactory.decodeResource(context.resources, R.drawable.gotify)
+        }
+        try {
+            return getImageFromUrl(
+                Utils.resolveAbsoluteUrl("${settings.url}/", app.image)
+            )
+        } catch (e: IOException) {
+            Logger.error(e, "Could not load image for notification")
+        }
+        return BitmapFactory.decodeResource(context.resources, R.drawable.gotify)
+    }
+
+    fun get() = imageLoader
+
+    @OptIn(ExperimentalCoilApi::class)
+    fun evict() {
+        try {
+            imageLoader.diskCache?.clear()
+            imageLoader.memoryCache?.clear()
+        } catch (e: IOException) {
+            Logger.error(e, "Problem evicting Coil cache")
+        }
+    }
+}
diff --git a/app/src/main/kotlin/com/github/gotify/MarkwonFactory.kt b/app/src/main/kotlin/com/github/gotify/MarkwonFactory.kt
index 9bee6031..0aebc294 100644
--- a/app/src/main/kotlin/com/github/gotify/MarkwonFactory.kt
+++ b/app/src/main/kotlin/com/github/gotify/MarkwonFactory.kt
@@ -10,7 +10,7 @@ import android.text.style.RelativeSizeSpan
 import android.text.style.StyleSpan
 import android.text.style.TypefaceSpan
 import androidx.core.content.ContextCompat
-import com.squareup.picasso.Picasso
+import coil.ImageLoader
 import io.noties.markwon.AbstractMarkwonPlugin
 import io.noties.markwon.Markwon
 import io.noties.markwon.MarkwonSpansFactory
@@ -22,7 +22,7 @@ import io.noties.markwon.core.MarkwonTheme
 import io.noties.markwon.ext.strikethrough.StrikethroughPlugin
 import io.noties.markwon.ext.tables.TableAwareMovementMethod
 import io.noties.markwon.ext.tables.TablePlugin
-import io.noties.markwon.image.picasso.PicassoImagesPlugin
+import io.noties.markwon.image.coil.CoilImagesPlugin
 import io.noties.markwon.movement.MovementMethodPlugin
 import org.commonmark.ext.gfm.tables.TableCell
 import org.commonmark.ext.gfm.tables.TablesExtension
@@ -36,11 +36,11 @@ import org.commonmark.node.StrongEmphasis
 import org.commonmark.parser.Parser
 
 internal object MarkwonFactory {
-    fun createForMessage(context: Context, picasso: Picasso): Markwon {
+    fun createForMessage(context: Context, imageLoader: ImageLoader): Markwon {
         return Markwon.builder(context)
             .usePlugin(CorePlugin.create())
             .usePlugin(MovementMethodPlugin.create(TableAwareMovementMethod.create()))
-            .usePlugin(PicassoImagesPlugin.create(picasso))
+            .usePlugin(CoilImagesPlugin.create(context, imageLoader))
             .usePlugin(StrikethroughPlugin.create())
             .usePlugin(TablePlugin.create(context))
             .usePlugin(object : AbstractMarkwonPlugin() {
@@ -52,13 +52,13 @@ internal object MarkwonFactory {
             .build()
     }
 
-    fun createForNotification(context: Context, picasso: Picasso): Markwon {
+    fun createForNotification(context: Context, imageLoader: ImageLoader): Markwon {
         val headingSizes = floatArrayOf(2f, 1.5f, 1.17f, 1f, .83f, .67f)
         val bulletGapWidth = (8 * context.resources.displayMetrics.density + 0.5f).toInt()
 
         return Markwon.builder(context)
             .usePlugin(CorePlugin.create())
-            .usePlugin(PicassoImagesPlugin.create(picasso))
+            .usePlugin(CoilImagesPlugin.create(context, imageLoader))
             .usePlugin(StrikethroughPlugin.create())
             .usePlugin(object : AbstractMarkwonPlugin() {
                 override fun configureSpansFactory(builder: MarkwonSpansFactory.Builder) {
diff --git a/app/src/main/kotlin/com/github/gotify/Utils.kt b/app/src/main/kotlin/com/github/gotify/Utils.kt
index 196d0481..277b4be1 100644
--- a/app/src/main/kotlin/com/github/gotify/Utils.kt
+++ b/app/src/main/kotlin/com/github/gotify/Utils.kt
@@ -3,19 +3,15 @@ package com.github.gotify
 import android.app.Activity
 import android.app.ActivityManager
 import android.content.Context
-import android.content.res.Resources
-import android.graphics.Bitmap
-import android.graphics.drawable.BitmapDrawable
 import android.graphics.drawable.Drawable
 import android.text.format.DateUtils
 import android.view.View
 import androidx.appcompat.app.AppCompatActivity
 import androidx.lifecycle.lifecycleScope
+import coil.target.Target
 import com.github.gotify.client.JSON
 import com.google.android.material.snackbar.Snackbar
 import com.google.gson.Gson
-import com.squareup.picasso.Picasso.LoadedFrom
-import com.squareup.picasso.Target
 import java.io.BufferedReader
 import java.io.IOException
 import java.io.InputStream
@@ -72,17 +68,15 @@ internal object Utils {
         }
     }
 
-    fun toDrawable(resources: Resources?, drawableReceiver: DrawableReceiver): Target {
+    fun toDrawable(drawableReceiver: DrawableReceiver): Target {
         return object : Target {
-            override fun onBitmapLoaded(bitmap: Bitmap, from: LoadedFrom) {
-                drawableReceiver.loaded(BitmapDrawable(resources, bitmap))
+            override fun onSuccess(result: Drawable) {
+                drawableReceiver.loaded(result)
             }
 
-            override fun onBitmapFailed(e: Exception, errorDrawable: Drawable) {
-                Logger.error(e, "Bitmap failed")
+            override fun onError(error: Drawable?) {
+                Logger.error("Bitmap failed")
             }
-
-            override fun onPrepareLoad(placeHolderDrawable: Drawable) {}
         }
     }
 
diff --git a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
index 1f2d31ef..79b1b08e 100644
--- a/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/login/LoginActivity.kt
@@ -32,7 +32,7 @@ import com.github.gotify.log.UncaughtExceptionHandler
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.textfield.TextInputEditText
 import java.security.cert.X509Certificate
-import okhttp3.HttpUrl
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 import org.tinylog.kotlin.Logger
 
 internal class LoginActivity : AppCompatActivity() {
@@ -101,13 +101,13 @@ internal class LoginActivity : AppCompatActivity() {
 
     private fun doCheckUrl() {
         val url = binding.gotifyUrlEditext.text.toString().trim().trimEnd('/')
-        val parsedUrl = HttpUrl.parse(url)
+        val parsedUrl = url.toHttpUrlOrNull()
         if (parsedUrl == null) {
             Utils.showSnackBar(this, "Invalid URL (include http:// or https://)")
             return
         }
 
-        if ("http" == parsedUrl.scheme()) {
+        if ("http" == parsedUrl.scheme) {
             showHttpWarning()
         }
 
diff --git a/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt b/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt
index a11f0500..d87ef7a7 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/ListMessageAdapter.kt
@@ -18,6 +18,8 @@ import androidx.recyclerview.widget.DiffUtil
 import androidx.recyclerview.widget.ListAdapter
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewbinding.ViewBinding
+import coil.ImageLoader
+import coil.load
 import com.github.gotify.MarkwonFactory
 import com.github.gotify.R
 import com.github.gotify.Settings
@@ -26,7 +28,6 @@ import com.github.gotify.client.model.Message
 import com.github.gotify.databinding.MessageItemBinding
 import com.github.gotify.databinding.MessageItemCompactBinding
 import com.github.gotify.messages.provider.MessageWithImage
-import com.squareup.picasso.Picasso
 import io.noties.markwon.Markwon
 import java.text.DateFormat
 import java.util.Date
@@ -35,11 +36,11 @@ import org.threeten.bp.OffsetDateTime
 internal class ListMessageAdapter(
     private val context: Context,
     private val settings: Settings,
-    private val picasso: Picasso,
+    private val imageLoader: ImageLoader,
     private val delete: Delete
 ) : ListAdapter<MessageWithImage, ListMessageAdapter.ViewHolder>(DiffCallback) {
     private val prefs: SharedPreferences = PreferenceManager.getDefaultSharedPreferences(context)
-    private val markwon: Markwon = MarkwonFactory.createForMessage(context, picasso)
+    private val markwon: Markwon = MarkwonFactory.createForMessage(context, imageLoader)
 
     private val timeFormatRelative =
         context.resources.getString(R.string.time_format_value_relative)
@@ -81,10 +82,11 @@ internal class ListMessageAdapter(
         }
         holder.title.text = message.message.title
         if (message.image != null) {
-            picasso.load(Utils.resolveAbsoluteUrl("${settings.url}/", message.image))
-                .error(R.drawable.ic_alarm)
-                .placeholder(R.drawable.ic_placeholder)
-                .into(holder.image)
+            val url = Utils.resolveAbsoluteUrl("${settings.url}/", message.image)
+            holder.image.load(url, imageLoader) {
+                error(R.drawable.ic_alarm)
+                placeholder(R.drawable.ic_placeholder)
+            }
         }
 
         val prefs = PreferenceManager.getDefaultSharedPreferences(context)
diff --git a/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt b/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
index f2f95f80..006a9810 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/MessagesActivity.kt
@@ -29,6 +29,7 @@ import androidx.recyclerview.widget.DividerItemDecoration
 import androidx.recyclerview.widget.ItemTouchHelper
 import androidx.recyclerview.widget.LinearLayoutManager
 import androidx.recyclerview.widget.RecyclerView
+import coil.request.ImageRequest
 import com.github.gotify.BuildConfig
 import com.github.gotify.MissedMessageUtil
 import com.github.gotify.R
@@ -57,7 +58,6 @@ import com.google.android.material.dialog.MaterialAlertDialogBuilder
 import com.google.android.material.navigation.NavigationView
 import com.google.android.material.snackbar.BaseTransientBottomBar.BaseCallback
 import com.google.android.material.snackbar.Snackbar
-import java.io.IOException
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.withContext
 import org.tinylog.kotlin.Logger
@@ -102,7 +102,7 @@ internal class MessagesActivity :
         listMessageAdapter = ListMessageAdapter(
             this,
             viewModel.settings,
-            viewModel.picassoHandler.get()
+            viewModel.coilHandler.get()
         ) { message ->
             scheduleDeletion(message)
         }
@@ -169,19 +169,20 @@ internal class MessagesActivity :
     }
 
     private fun refreshAll() {
-        try {
-            viewModel.picassoHandler.evict()
-        } catch (e: IOException) {
-            Logger.error(e, "Problem evicting Picasso cache")
-        }
+        viewModel.coilHandler.evict()
         startActivity(Intent(this, InitializationActivity::class.java))
         finish()
     }
 
     private fun onRefresh() {
+        viewModel.coilHandler.evict()
         viewModel.messages.clear()
         launchCoroutine {
-            loadMore(viewModel.appId)
+            loadMore(viewModel.appId).forEachIndexed { index, message ->
+                if (message.image != null) {
+                    listMessageAdapter.notifyItemChanged(index)
+                }
+            }
         }
     }
 
@@ -201,15 +202,18 @@ internal class MessagesActivity :
             val item = menu.add(R.id.apps, index, APPLICATION_ORDER, app.name)
             item.isCheckable = true
             if (app.id == viewModel.appId) selectedItem = item
-            val t = Utils.toDrawable(resources) { icon -> item.icon = icon }
+            val t = Utils.toDrawable { icon -> item.icon = icon }
             viewModel.targetReferences.add(t)
-            viewModel.picassoHandler
-                .get()
-                .load(Utils.resolveAbsoluteUrl(viewModel.settings.url + "/", app.image))
+            val request = ImageRequest.Builder(this)
+                .data(Utils.resolveAbsoluteUrl(viewModel.settings.url + "/", app.image))
                 .error(R.drawable.ic_alarm)
                 .placeholder(R.drawable.ic_placeholder)
-                .resize(100, 100)
-                .into(t)
+                .size(100, 100)
+                .target(t)
+                .build()
+            viewModel.coilHandler
+                .get()
+                .enqueue(request)
         }
         selectAppInMenu(selectedItem)
     }
@@ -552,11 +556,12 @@ internal class MessagesActivity :
             )
     }
 
-    private suspend fun loadMore(appId: Long) {
+    private suspend fun loadMore(appId: Long): List<MessageWithImage> {
         val messagesWithImages = viewModel.messages.loadMore(appId)
         withContext(Dispatchers.Main) {
             updateMessagesAndStopLoading(messagesWithImages)
         }
+        return messagesWithImages
     }
 
     private suspend fun updateMessagesForApplication(withLoadingSpinner: Boolean, appId: Long) {
diff --git a/app/src/main/kotlin/com/github/gotify/messages/MessagesModel.kt b/app/src/main/kotlin/com/github/gotify/messages/MessagesModel.kt
index bcd7c470..b2efcd2f 100644
--- a/app/src/main/kotlin/com/github/gotify/messages/MessagesModel.kt
+++ b/app/src/main/kotlin/com/github/gotify/messages/MessagesModel.kt
@@ -2,18 +2,18 @@ package com.github.gotify.messages
 
 import android.app.Activity
 import androidx.lifecycle.ViewModel
+import coil.target.Target
+import com.github.gotify.CoilHandler
 import com.github.gotify.Settings
 import com.github.gotify.api.ClientFactory
 import com.github.gotify.client.api.MessageApi
 import com.github.gotify.messages.provider.ApplicationHolder
 import com.github.gotify.messages.provider.MessageFacade
 import com.github.gotify.messages.provider.MessageState
-import com.github.gotify.picasso.PicassoHandler
-import com.squareup.picasso.Target
 
 internal class MessagesModel(parentView: Activity) : ViewModel() {
     val settings = Settings(parentView)
-    val picassoHandler = PicassoHandler(parentView, settings)
+    val coilHandler = CoilHandler(parentView, settings)
     val client = ClientFactory.clientToken(settings.url, settings.sslSettings(), settings.token)
     val appsHolder = ApplicationHolder(parentView, client)
     val messages = MessageFacade(client.createService(MessageApi::class.java), appsHolder)
diff --git a/app/src/main/kotlin/com/github/gotify/picasso/PicassoDataRequestHandler.kt b/app/src/main/kotlin/com/github/gotify/picasso/PicassoDataRequestHandler.kt
deleted file mode 100644
index 091fb6f8..00000000
--- a/app/src/main/kotlin/com/github/gotify/picasso/PicassoDataRequestHandler.kt
+++ /dev/null
@@ -1,39 +0,0 @@
-package com.github.gotify.picasso
-
-import android.graphics.BitmapFactory
-import android.util.Base64
-import com.squareup.picasso.Picasso
-import com.squareup.picasso.Request
-import com.squareup.picasso.RequestHandler
-import org.tinylog.kotlin.Logger
-
-/**
- * Adapted from https://github.com/square/picasso/issues/1395#issuecomment-220929377 By
- * https://github.com/SmartDengg
- */
-internal class PicassoDataRequestHandler : RequestHandler() {
-    companion object {
-        private const val DATA_SCHEME = "data"
-    }
-
-    override fun canHandleRequest(data: Request): Boolean {
-        val scheme = data.uri.scheme
-        return DATA_SCHEME.equals(scheme, ignoreCase = true)
-    }
-
-    override fun load(request: Request, networkPolicy: Int): Result {
-        val uri = request.uri.toString()
-        val imageDataBytes = uri.substring(uri.indexOf(",") + 1)
-        val bytes = Base64.decode(imageDataBytes.toByteArray(), Base64.DEFAULT)
-        val bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.size)
-
-        if (bitmap == null) {
-            val show = if (uri.length > 50) uri.take(50) + "..." else uri
-            val malformed = RuntimeException("Malformed data uri: $show")
-            Logger.error(malformed, "Could not load image")
-            throw malformed
-        }
-
-        return Result(bitmap, Picasso.LoadedFrom.NETWORK)
-    }
-}
diff --git a/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt b/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt
deleted file mode 100644
index 0189d6aa..00000000
--- a/app/src/main/kotlin/com/github/gotify/picasso/PicassoHandler.kt
+++ /dev/null
@@ -1,66 +0,0 @@
-package com.github.gotify.picasso
-
-import android.content.Context
-import android.graphics.Bitmap
-import android.graphics.BitmapFactory
-import com.github.gotify.R
-import com.github.gotify.Settings
-import com.github.gotify.Utils
-import com.github.gotify.api.CertUtils
-import com.github.gotify.client.model.Application
-import com.squareup.picasso.OkHttp3Downloader
-import com.squareup.picasso.Picasso
-import java.io.File
-import java.io.IOException
-import okhttp3.Cache
-import okhttp3.OkHttpClient
-import org.tinylog.kotlin.Logger
-
-internal class PicassoHandler(private val context: Context, private val settings: Settings) {
-    companion object {
-        private const val PICASSO_CACHE_SIZE = 50 * 1024 * 1024 // 50 MB
-        private const val PICASSO_CACHE_SUBFOLDER = "picasso-cache"
-    }
-
-    private val picassoCache = Cache(
-        File(context.cacheDir, PICASSO_CACHE_SUBFOLDER),
-        PICASSO_CACHE_SIZE.toLong()
-    )
-
-    private val picasso = makePicasso()
-
-    private fun makePicasso(): Picasso {
-        val builder = OkHttpClient.Builder()
-        builder.cache(picassoCache)
-        CertUtils.applySslSettings(builder, settings.sslSettings())
-        val downloader = OkHttp3Downloader(builder.build())
-        return Picasso.Builder(context)
-            .addRequestHandler(PicassoDataRequestHandler())
-            .downloader(downloader)
-            .build()
-    }
-
-    @Throws(IOException::class)
-    fun getImageFromUrl(url: String?): Bitmap = picasso.load(url).get()
-
-    fun getIcon(app: Application?): Bitmap {
-        if (app == null) {
-            return BitmapFactory.decodeResource(context.resources, R.drawable.gotify)
-        }
-        try {
-            return getImageFromUrl(
-                Utils.resolveAbsoluteUrl("${settings.url}/", app.image)
-            )
-        } catch (e: IOException) {
-            Logger.error(e, "Could not load image for notification")
-        }
-        return BitmapFactory.decodeResource(context.resources, R.drawable.gotify)
-    }
-
-    fun get() = picasso
-
-    @Throws(IOException::class)
-    fun evict() {
-        picassoCache.evictAll()
-    }
-}
diff --git a/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt b/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt
index 6b149840..b3e809c2 100644
--- a/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt
+++ b/app/src/main/kotlin/com/github/gotify/service/WebSocketConnection.kt
@@ -11,7 +11,7 @@ import com.github.gotify.client.model.Message
 import java.util.Calendar
 import java.util.concurrent.TimeUnit
 import java.util.concurrent.atomic.AtomicLong
-import okhttp3.HttpUrl
+import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
 import okhttp3.OkHttpClient
 import okhttp3.Request
 import okhttp3.Response
@@ -89,7 +89,7 @@ internal class WebSocketConnection(
     }
 
     private fun request(): Request {
-        val url = HttpUrl.parse(baseUrl)!!
+        val url = baseUrl.toHttpUrlOrNull()!!
             .newBuilder()
             .addPathSegment("stream")
             .addQueryParameter("token", token)
@@ -187,12 +187,12 @@ internal class WebSocketConnection(
         }
 
         override fun onFailure(webSocket: WebSocket, t: Throwable, response: Response?) {
-            val code = if (response != null) "StatusCode: ${response.code()}" else ""
-            val message = if (response != null) response.message() else ""
+            val code = if (response != null) "StatusCode: ${response.code}" else ""
+            val message = response?.message ?: ""
             Logger.error(t) { "WebSocket($id): failure $code Message: $message" }
             syncExec(id) {
                 closed()
-                if (response != null && response.code() >= 400 && response.code() <= 499) {
+                if (response != null && response.code >= 400 && response.code <= 499) {
                     onBadRequest.execute(message)
                     return@syncExec
                 }
diff --git a/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt b/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
index e2fc90d0..79e51a0c 100644
--- a/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
+++ b/app/src/main/kotlin/com/github/gotify/service/WebSocketService.kt
@@ -17,6 +17,7 @@ import androidx.annotation.RequiresApi
 import androidx.core.app.NotificationCompat
 import androidx.core.content.ContextCompat
 import com.github.gotify.BuildConfig
+import com.github.gotify.CoilHandler
 import com.github.gotify.MarkwonFactory
 import com.github.gotify.MissedMessageUtil
 import com.github.gotify.NotificationSupport
@@ -34,7 +35,6 @@ import com.github.gotify.log.UncaughtExceptionHandler
 import com.github.gotify.messages.Extras
 import com.github.gotify.messages.IntentUrlDialogActivity
 import com.github.gotify.messages.MessagesActivity
-import com.github.gotify.picasso.PicassoHandler
 import io.noties.markwon.Markwon
 import java.util.concurrent.ConcurrentHashMap
 import java.util.concurrent.atomic.AtomicLong
@@ -62,7 +62,7 @@ internal class WebSocketService : Service() {
     private val lastReceivedMessage = AtomicLong(NOT_LOADED)
     private lateinit var missingMessageUtil: MissedMessageUtil
 
-    private lateinit var picassoHandler: PicassoHandler
+    private lateinit var coilHandler: CoilHandler
     private lateinit var markwon: Markwon
 
     override fun onCreate() {
@@ -75,8 +75,8 @@ internal class WebSocketService : Service() {
         )
         missingMessageUtil = MissedMessageUtil(client.createService(MessageApi::class.java))
         Logger.info("Create ${javaClass.simpleName}")
-        picassoHandler = PicassoHandler(this, settings)
-        markwon = MarkwonFactory.createForNotification(this, picassoHandler.get())
+        coilHandler = CoilHandler(this, settings)
+        markwon = MarkwonFactory.createForNotification(this, coilHandler.get())
     }
 
     override fun onDestroy() {
@@ -381,7 +381,7 @@ internal class WebSocketService : Service() {
             .setDefaults(Notification.DEFAULT_ALL)
             .setWhen(System.currentTimeMillis())
             .setSmallIcon(R.drawable.ic_gotify)
-            .setLargeIcon(picassoHandler.getIcon(appIdToApp[appId]))
+            .setLargeIcon(coilHandler.getIcon(appIdToApp[appId]))
             .setTicker("${getString(R.string.app_name)} - $title")
             .setGroup(NotificationSupport.Group.MESSAGES)
             .setContentTitle(title)
@@ -410,7 +410,7 @@ internal class WebSocketService : Service() {
             try {
                 b.setStyle(
                     NotificationCompat.BigPictureStyle()
-                        .bigPicture(picassoHandler.getImageFromUrl(notificationImageUrl))
+                        .bigPicture(coilHandler.getImageFromUrl(notificationImageUrl))
                 )
             } catch (e: Exception) {
                 Logger.error(e, "Error loading bigImageUrl")