diff --git a/index.js b/index.js
index 366692f..0c2fe70 100644
--- a/index.js
+++ b/index.js
@@ -4,6 +4,7 @@ import * as client from "openid-client";
 import session from "express-session";
 import morgan from "morgan";
 import bodyParser from "body-parser";
+import { chain, isObject } from "lodash-es";
 
 const port = parseInt(process.env.PORT, 10) || 3000;
 const app = express();
@@ -18,18 +19,12 @@ app.use(
 );
 app.use(morgan("combined"));
 
-const removeNullValues = (obj) =>
-  Object.entries(obj).reduce((a, [k, v]) => (v ? ((a[k] = v), a) : a), {});
-
 const objToUrlParams = (obj) =>
   new URLSearchParams(
-    Object.fromEntries(
-      Object.entries(obj).map(([k, v]) => [
-        k,
-        // stringify objects
-        typeof v === "object" && v !== null ? JSON.stringify(v) : v,
-      ]),
-    ),
+    chain(obj)
+      .omitBy((v) => !v)
+      .mapValues((o) => (isObject(o) ? JSON.stringify(o) : o))
+      .value(),
   );
 
 const getCurrentUrl = (req) =>
@@ -90,14 +85,12 @@ const getAuthorizationControllerFactory = (extraParams) => {
 
       const redirectUrl = client.buildAuthorizationUrl(
         config,
-        objToUrlParams(
-          removeNullValues({
-            nonce,
-            state,
-            ...AUTHORIZATION_DEFAULT_PARAMS,
-            ...extraParams,
-          }),
-        ),
+        objToUrlParams({
+          nonce,
+          state,
+          ...AUTHORIZATION_DEFAULT_PARAMS,
+          ...extraParams,
+        }),
       );
 
       res.redirect(redirectUrl);
@@ -193,10 +186,10 @@ app.post("/logout", async (req, res, next) => {
     const config = await getProviderConfig();
     const redirectUrl = client.buildEndSessionUrl(
       config,
-      objToUrlParams(removeNullValues({
+      objToUrlParams({
         post_logout_redirect_uri: `${process.env.HOST}/`,
         id_token_hint,
-      })),
+      }),
     );
 
     res.redirect(redirectUrl);
diff --git a/package-lock.json b/package-lock.json
index f3698fe..b4b7530 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -14,6 +14,7 @@
         "ejs": "^3.1.10",
         "express": "^4.21.1",
         "express-session": "^1.18.1",
+        "lodash-es": "^4.17.21",
         "morgan": "^1.10.0",
         "openid-client": "^6.1.3"
       },
@@ -604,6 +605,11 @@
         "url": "https://github.com/sponsors/panva"
       }
     },
+    "node_modules/lodash-es": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.21.tgz",
+      "integrity": "sha512-mKnC+QJ9pWVzv+C4/U3rRsHapFfHvQFoFB92e52xeyGMcX6/OlIl78je1u8vePzYZSkkogMPJ2yjxxsb89cxyw=="
+    },
     "node_modules/media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
@@ -1465,6 +1471,11 @@
       "resolved": "https://registry.npmjs.org/jose/-/jose-5.9.6.tgz",
       "integrity": "sha512-AMlnetc9+CV9asI19zHmrgS/WYsWUwCn2R7RzlbJWD7F9eWYUTGyBmU9o6PxngtLGOiDGPRu+Uc4fhKzbpteZQ=="
     },
+    "lodash-es": {
+      "version": "4.17.21",
+      "resolved": "https://registry.npmjs.org/lodash-es/-/lodash-es-4.17.21.tgz",
+      "integrity": "sha512-mKnC+QJ9pWVzv+C4/U3rRsHapFfHvQFoFB92e52xeyGMcX6/OlIl78je1u8vePzYZSkkogMPJ2yjxxsb89cxyw=="
+    },
     "media-typer": {
       "version": "0.3.0",
       "resolved": "https://registry.npmjs.org/media-typer/-/media-typer-0.3.0.tgz",
diff --git a/package.json b/package.json
index e70f908..9c794db 100644
--- a/package.json
+++ b/package.json
@@ -24,6 +24,7 @@
     "ejs": "^3.1.10",
     "express": "^4.21.1",
     "express-session": "^1.18.1",
+    "lodash-es": "^4.17.21",
     "morgan": "^1.10.0",
     "openid-client": "^6.1.3"
   },