diff --git a/build.gradle b/build.gradle
index f4d774a..b9e1fca 100644
--- a/build.gradle
+++ b/build.gradle
@@ -25,7 +25,7 @@ compileTestJava.options.encoding = "UTF-8"
 
 java {
     toolchain {
-        languageVersion = JavaLanguageVersion.of(25)
+        languageVersion = JavaLanguageVersion.of(21)
     }
 }
 
diff --git a/src/main/java/emu/nebula/server/HttpServer.java b/src/main/java/emu/nebula/server/HttpServer.java
index 2d4677c..079d3a7 100644
--- a/src/main/java/emu/nebula/server/HttpServer.java
+++ b/src/main/java/emu/nebula/server/HttpServer.java
@@ -84,7 +84,7 @@ public class HttpServer {
         }
         
         // Exception handler
-        getApp().exception(Exception.class, (e, _) -> {
+        getApp().exception(Exception.class, (e, c) -> {
             e.printStackTrace();
         });