diff --git a/build.gradle b/build.gradle
index b08552a020a..3e199a20580 100644
--- a/build.gradle
+++ b/build.gradle
@@ -40,8 +40,8 @@ group = "org.jabref"
 version = project.findProperty('projVersion') ?: '100.0.0'
 
 java {
-    sourceCompatibility = JavaVersion.VERSION_20
-    targetCompatibility = JavaVersion.VERSION_20
+    sourceCompatibility = JavaVersion.VERSION_19
+    targetCompatibility = JavaVersion.VERSION_19
     // Workaround needed for Eclipse, probably because of https://github.com/gradle/gradle/issues/16922
     // Should be removed as soon as Gradle 7.0.1 is released ( https://github.com/gradle/gradle/issues/16922#issuecomment-828217060 )
     modularity.inferModulePath.set(false)