diff --git a/package.json b/package.json
index 33c4ec3..fde4d3c 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@bit-js/byte",
-  "version": "1.3.4",
+  "version": "1.3.5",
   "module": "index.js",
   "devDependencies": {
     "@types/bun": "latest",
diff --git a/src/core/server/index.ts b/src/core/server/index.ts
index 8932c61..dd8b4be 100644
--- a/src/core/server/index.ts
+++ b/src/core/server/index.ts
@@ -37,8 +37,8 @@ type HandlerRegisters<T extends RoutesRecord> = {
 /**
  * A plugin
  */
-export interface Plugin {
-    plug(app: BaseByte): any;
+export abstract class Plugin {
+    abstract plug(app: BaseByte): any;
 }
 
 /**
@@ -161,6 +161,13 @@ export class Byte<Rec extends RoutesRecord = []> implements ProtoSchema {
         return fn;
     }
 
+    /**
+     * Create an alter handler
+     */
+    static alter<const T extends AlterFn>(fn: T) {
+        return fn;
+    }
+
     /**
      * Create a plugin
      */