diff --git a/config/checkstyle/import-control.xml b/config/checkstyle/import-control.xml
index 07b74fba9..67f78b649 100644
--- a/config/checkstyle/import-control.xml
+++ b/config/checkstyle/import-control.xml
@@ -42,6 +42,10 @@
     <allow pkg="com.google.auto"/>
     <allow pkg="it.unimi.dsi.fastutil"/>
 
+    <subpackage name="internal.expression">
+      <allow pkg="org.antlr.v4"/>
+    </subpackage>
+
     <subpackage name="bukkit">
       <allow pkg="org.bukkit"/>
       <allow pkg="org.bstats.bukkit"/>
diff --git a/worldedit-core/build.gradle.kts b/worldedit-core/build.gradle.kts
index 19dcecc05..188dc7430 100644
--- a/worldedit-core/build.gradle.kts
+++ b/worldedit-core/build.gradle.kts
@@ -1,3 +1,4 @@
+import net.minecrell.gradle.licenser.LicenseExtension
 import org.gradle.plugins.ide.idea.model.IdeaModel
 
 plugins {
@@ -52,6 +53,15 @@ tasks.named<AntlrTask>("generateGrammarSource").configure {
     )
 }
 
+configure<LicenseExtension> {
+    exclude {
+        it.file.startsWith(project.buildDir)
+    }
+}
+tasks.withType<Checkstyle>().configureEach {
+    exclude("com/sk89q/worldedit/antlr/**/*.java")
+}
+
 // Give intellij info about where ANTLR code comes from
 plugins.withId("idea") {
     configure<IdeaModel> {