diff --git a/src/main/java/org/jenkinsci/plugins/scriptler/builder/ScriptlerBuilder.java b/src/main/java/org/jenkinsci/plugins/scriptler/builder/ScriptlerBuilder.java
index d6191021..758f6293 100644
--- a/src/main/java/org/jenkinsci/plugins/scriptler/builder/ScriptlerBuilder.java
+++ b/src/main/java/org/jenkinsci/plugins/scriptler/builder/ScriptlerBuilder.java
@@ -30,6 +30,7 @@
 import java.io.Serial;
 import java.io.Serializable;
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -108,7 +109,7 @@ public ScriptlerBuilder(
             @CheckForNull List<Parameter> parameters) {
         this.builderId = builderId;
         this.scriptId = scriptId;
-        this.parameters = parameters == null ? List.of() : List.copyOf(parameters);
+        this.parameters = new ArrayList<>(parameters == null ? List.of() : parameters);
         this.propagateParams = propagateParams;
     }
 
@@ -180,7 +181,7 @@ public Parameter[] getParameters() {
 
     @NonNull
     public List<Parameter> getParametersList() {
-        return parameters;
+        return Collections.unmodifiableList(parameters);
     }
 
     public String getBuilderId() {
diff --git a/src/main/resources/META-INF/hudson.remoting.ClassFilter b/src/main/resources/META-INF/hudson.remoting.ClassFilter
deleted file mode 100644
index d6da0060..00000000
--- a/src/main/resources/META-INF/hudson.remoting.ClassFilter
+++ /dev/null
@@ -1,2 +0,0 @@
-java.util.ImmutableCollections$ListN
-java.util.ImmutableCollections$List12