diff --git a/shillelagh/src/main/java/shillelagh/internal/ShillelaghInjector.java b/shillelagh/src/main/java/shillelagh/internal/ShillelaghInjector.java
index <HASH>..<HASH> 100644
--- a/shillelagh/src/main/java/shillelagh/internal/ShillelaghInjector.java
+++ b/shillelagh/src/main/java/shillelagh/internal/ShillelaghInjector.java
@@ -4,7 +4,7 @@ import java.util.HashMap;
 import java.util.Iterator;
 
 /** Class in charge of creating all the code injected into other classes */
-public class ShillelaghInjector {
+public final class ShillelaghInjector {
 
   // I'm not really happy with the code in here, but then again, I'm writing Java in Strings...
made ShillelaghInjector final