diff --git a/lab2/zad2/app/build.gradle.kts b/lab2/zad2/app/build.gradle.kts
index 29238bf..c5b2546 100644
--- a/lab2/zad2/app/build.gradle.kts
+++ b/lab2/zad2/app/build.gradle.kts
@@ -28,7 +28,7 @@ dependencies {
 // Apply a specific Java toolchain to ease working on different environments.
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(21)
+        languageVersion = JavaLanguageVersion.of(19)
     }
 }