diff --git a/build.gradle b/build.gradle
index d1d94fb..f6101c2 100644
--- a/build.gradle
+++ b/build.gradle
@@ -30,7 +30,7 @@ group = 'com.graphql-java'
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(11)
+        languageVersion = JavaLanguageVersion.of(17)
     }
 }