diff --git a/.gitea/workflows/android.yml b/.gitea/workflows/android.yml
index 136e065..b351c61 100644
--- a/.gitea/workflows/android.yml
+++ b/.gitea/workflows/android.yml
@@ -15,7 +15,7 @@ jobs:
       - name: Setup JDK
         uses: actions/setup-java@v4
         with:
-          java-version: '21'
+          java-version: '17'
           distribution: 'temurin'
 
       - name: Setup Android SDK
diff --git a/app/build.gradle b/app/build.gradle
index 5a58293..0c809c7 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -37,14 +37,14 @@ android {
     }
 
     compileOptions {
-        sourceCompatibility JavaVersion.VERSION_21
-        targetCompatibility JavaVersion.VERSION_21
+        sourceCompatibility JavaVersion.VERSION_17
+        targetCompatibility JavaVersion.VERSION_17
         coreLibraryDesugaringEnabled true
     }
 
     java {
         toolchain {
-            languageVersion = JavaLanguageVersion.of(21)
+            languageVersion = JavaLanguageVersion.of(17)
         }
     }