diff --git a/uhabits-android/build.gradle.kts b/uhabits-android/build.gradle.kts
index 4e17ed177..ed6968598 100644
--- a/uhabits-android/build.gradle.kts
+++ b/uhabits-android/build.gradle.kts
@@ -37,7 +37,7 @@ Updating gradle might fix this, so try again in the future to remove this and ru
 If this doesn't produce any warning, try to remove it.
  */
 kotlin {
-    jvmToolchain(17)
+    jvmToolchain(11)
 }
 
 android {
diff --git a/uhabits-core/build.gradle.kts b/uhabits-core/build.gradle.kts
index b4f09b2bb..6a7ca5c93 100644
--- a/uhabits-core/build.gradle.kts
+++ b/uhabits-core/build.gradle.kts
@@ -24,7 +24,7 @@ plugins {
 
 kotlin {
     jvm().withJava()
-    jvmToolchain(17)
+    jvmToolchain(11)
 
     sourceSets {
         val commonMain by getting {