diff --git a/Sources/NostrSDK/Events/DirectMessageEvent.swift b/Sources/NostrSDK/Events/DirectMessageEvent.swift
index a4afe16..d50369e 100644
--- a/Sources/NostrSDK/Events/DirectMessageEvent.swift
+++ b/Sources/NostrSDK/Events/DirectMessageEvent.swift
@@ -12,7 +12,7 @@ import Foundation
 /// > Note: [NIP-04 Specification](https://github.com/nostr-protocol/nips/blob/master/04.md)
 public final class DirectMessageEvent: NostrEvent, DirectMessageEncrypting {
 
-    public func decryptedContent(keypair: Keypair) throws -> String {
+    public func decryptedContent(using privateKey: PrivateKey) throws -> String {
         let recipient = tags.first { tag in
             tag.name == .pubkey
         }
@@ -21,7 +21,7 @@ public final class DirectMessageEvent: NostrEvent, DirectMessageEncrypting {
            fatalError()
         }
 
-        let decryptedContent = try decrypt(encryptedContent: content, privateKey: keypair.privateKey, publicKey: recipientPublicKey)
+        let decryptedContent = try decrypt(encryptedContent: content, privateKey: privateKey, publicKey: recipientPublicKey)
 
         return decryptedContent
     }
diff --git a/Tests/NostrSDKTests/EventCreatingTests.swift b/Tests/NostrSDKTests/EventCreatingTests.swift
index da0f1ca..4295b24 100644
--- a/Tests/NostrSDKTests/EventCreatingTests.swift
+++ b/Tests/NostrSDKTests/EventCreatingTests.swift
@@ -26,7 +26,7 @@ final class EventCreatingTests: XCTestCase, EventCreating, EventVerifying {
         XCTAssertEqual(tag, recipientTag)
 
         // Content should be decryptable
-        XCTAssertEqual(try event.decryptedContent(keypair: Keypair.test), content)
+        XCTAssertEqual(try event.decryptedContent(using: Keypair.test.privateKey), content)
 
         try verifyEvent(event)
     }
diff --git a/Tests/NostrSDKTests/EventDecodingTests.swift b/Tests/NostrSDKTests/EventDecodingTests.swift
index 322706a..7830ad4 100644
--- a/Tests/NostrSDKTests/EventDecodingTests.swift
+++ b/Tests/NostrSDKTests/EventDecodingTests.swift
@@ -75,7 +75,7 @@ final class EventDecodingTests: XCTestCase, FixtureLoading {
         ]
         XCTAssertEqual(expectedTags, event.tags)
 
-        XCTAssertEqual(try event.decryptedContent(keypair: Keypair.test), "Secret message.")
+        XCTAssertEqual(try event.decryptedContent(using: Keypair.test.privateKey), "Secret message.")
     }
     
     func testDecodeRecommendServer() throws {