diff --git a/core/build.gradle b/core/build.gradle
index 4019af1..0cad2ec 100644
--- a/core/build.gradle
+++ b/core/build.gradle
@@ -1,4 +1,4 @@
-sourceCompatibility = 1.15
+sourceCompatibility = 1.8
 [compileJava, compileTestJava]*.options*.encoding = 'UTF-8'
 
 sourceSets.main.java.srcDirs = [ "src/" ]
diff --git a/desktop/build.gradle b/desktop/build.gradle
index 1cf7925..e5c6990 100644
--- a/desktop/build.gradle
+++ b/desktop/build.gradle
@@ -1,4 +1,4 @@
-sourceCompatibility = 1.15
+sourceCompatibility = 1.8
 sourceSets.main.java.srcDirs = [ "src/" ]
 sourceSets.main.resources.srcDirs = ["../core/assets"]