diff --git a/src/main/java/noppes/npcs/CustomNpcs.java b/src/main/java/noppes/npcs/CustomNpcs.java
index ad42bc419..3a6ac92d9 100644
--- a/src/main/java/noppes/npcs/CustomNpcs.java
+++ b/src/main/java/noppes/npcs/CustomNpcs.java
@@ -173,7 +173,8 @@ public class CustomNpcs {
             AdvancedClassFilter filter = new AdvancedClassFilter()
                 .addRegexes("noppes\\.npcs\\.api\\..*")
                 .banRegexes(".*ClassLoader.*",
-                    ".*File*.");
+                    ".*File*.",
+                    "java\\.lang\\.reflect\\..*");
 
             for (Consumer<AdvancedClassFilter> consumer : clientClassFilterConsumer) {
                 consumer.accept(filter);
diff --git a/src/main/java/somehussar/janino/AdvancedClassFilter.java b/src/main/java/somehussar/janino/AdvancedClassFilter.java
index fb1fac6e8..b48de2c30 100644
--- a/src/main/java/somehussar/janino/AdvancedClassFilter.java
+++ b/src/main/java/somehussar/janino/AdvancedClassFilter.java
@@ -17,7 +17,7 @@ public class AdvancedClassFilter implements LoadClassCondition {
 
     public AdvancedClassFilter() {
         addClasses("java.io.Serializable", "java.util.Iterator");
-        addRegexes("java\\.lang\\..");
+        addRegexes("java\\.lang\\..*");
     }
 
     public AdvancedClassFilter addRegexes(String... classRegexes) {