diff --git a/CuckooChess/build.gradle b/CuckooChess/build.gradle
index 56481d0..e8e1c1b 100644
--- a/CuckooChess/build.gradle
+++ b/CuckooChess/build.gradle
@@ -21,5 +21,5 @@ dependencies {
     testImplementation 'org.mockito:mockito-core:1.10.19'
 }
 
-sourceCompatibility = "7"
-targetCompatibility = "7"
+sourceCompatibility = "8"
+targetCompatibility = "8"
diff --git a/CuckooChessEngine/build.gradle b/CuckooChessEngine/build.gradle
index e7d7f1c..9349ebc 100644
--- a/CuckooChessEngine/build.gradle
+++ b/CuckooChessEngine/build.gradle
@@ -11,8 +11,8 @@ dependencies {
     testImplementation 'org.mockito:mockito-core:1.10.19'
 }
 
-sourceCompatibility = "7"
-targetCompatibility = "7"
+sourceCompatibility = '8'
+targetCompatibility = '8'
 
 
 // Build internal opening book