diff --git a/OpenKeychain/build.gradle b/OpenKeychain/build.gradle
index 1948aed90..d8eb9165e 100644
--- a/OpenKeychain/build.gradle
+++ b/OpenKeychain/build.gradle
@@ -111,6 +111,12 @@ android {
         sourceCompatibility JavaVersion.VERSION_17
         targetCompatibility JavaVersion.VERSION_17
     }
+    kotlinOptions {
+        jvmTarget = "17"
+    }
+    kotlin {
+        jvmToolchain(17)
+    }
 
     testOptions.unitTests.all {
         // log results of tests to console, useful for travis