diff --git a/modules/expo-bluesky-oauth-client/android/src/main/java/expo/modules/blueskyoauthclient/CryptoUtil.kt b/modules/expo-bluesky-oauth-client/android/src/main/java/expo/modules/blueskyoauthclient/CryptoUtil.kt
index eab729a8b8..4a40453a39 100644
--- a/modules/expo-bluesky-oauth-client/android/src/main/java/expo/modules/blueskyoauthclient/CryptoUtil.kt
+++ b/modules/expo-bluesky-oauth-client/android/src/main/java/expo/modules/blueskyoauthclient/CryptoUtil.kt
@@ -11,7 +11,8 @@ import com.nimbusds.jose.jwk.KeyUse
 import java.util.UUID
 
 class CryptoUtil {
-  fun digest(data: ByteArray): ByteArray {
+  fun digest(data: ByteArray, algorithmName: String): ByteArray {
+    if(algorithmName != "sha256") throw Exception("Unsupported algorithm")
     val digest = MessageDigest.getInstance("sha256")
     return digest.digest(data)
   }
diff --git a/modules/expo-bluesky-oauth-client/ios/ExpoBlueskyOAuthClientModule.swift b/modules/expo-bluesky-oauth-client/ios/ExpoBlueskyOAuthClientModule.swift
index ee0b4f5ce5..702e56253a 100644
--- a/modules/expo-bluesky-oauth-client/ios/ExpoBlueskyOAuthClientModule.swift
+++ b/modules/expo-bluesky-oauth-client/ios/ExpoBlueskyOAuthClientModule.swift
@@ -5,7 +5,11 @@ public class ExpoBlueskyOAuthClientModule: Module {
   public func definition() -> ModuleDefinition {
     Name("ExpoBlueskyOAuthClient")
 
-    AsyncFunction("digest") { (data: Data, promise: Promise) in
+    AsyncFunction("digest") { (data: Data, algorithmName: String, promise: Promise) in
+      if algorithmName != "sha256" {
+        promise.reject("Error", "Algorithim not supported")
+        return
+      }
       promise.resolve(CryptoUtil.digest(data: data))
     }
 
diff --git a/modules/expo-bluesky-oauth-client/src/react-native-crypto-implementation.ts b/modules/expo-bluesky-oauth-client/src/react-native-crypto-implementation.ts
index 26f58dc7b2..1de6d7e6b5 100644
--- a/modules/expo-bluesky-oauth-client/src/react-native-crypto-implementation.ts
+++ b/modules/expo-bluesky-oauth-client/src/react-native-crypto-implementation.ts
@@ -18,6 +18,7 @@ export class ReactNativeCryptoImplementation implements CryptoImplementation {
     bytes: Uint8Array,
     algorithm: DigestAlgorithm,
   ): Promise<Uint8Array> {
+    console.log(algorithm)
     return OauthClientReactNative.digest(bytes, algorithm.name)
   }
 }