diff --git a/package-lock.json b/package-lock.json
index 5baa75f..f0b63a2 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,16 +1,17 @@
 {
   "name": "@squeebot/core",
-  "version": "3.3.5",
+  "version": "3.4.1",
   "lockfileVersion": 2,
   "requires": true,
   "packages": {
     "": {
       "name": "@squeebot/core",
-      "version": "3.3.5",
+      "version": "3.4.1",
       "license": "MIT",
       "dependencies": {
         "dateformat": "^4.5.1",
         "fs-extra": "^10.0.0",
+        "reflect-metadata": "^0.1.13",
         "semver": "^7.3.5",
         "tar": "^6.1.11"
       },
@@ -1410,6 +1411,11 @@
         }
       ]
     },
+    "node_modules/reflect-metadata": {
+      "version": "0.1.13",
+      "resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.1.13.tgz",
+      "integrity": "sha512-Ts1Y/anZELhSsjMcU605fU9RE4Oi3p5ORujwbIKXfWa+0Zxs510Qrmrce5/Jowq3cHSZSJqBjypxmHarc+vEWg=="
+    },
     "node_modules/regexpp": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-3.2.0.tgz",
@@ -2719,6 +2725,11 @@
       "integrity": "sha512-NuaNSa6flKT5JaSYQzJok04JzTL1CA6aGhv5rfLW3PgqA+M2ChpZQnAC8h8i4ZFkBS8X5RqkDBHA7r4hej3K9A==",
       "dev": true
     },
+    "reflect-metadata": {
+      "version": "0.1.13",
+      "resolved": "https://registry.npmjs.org/reflect-metadata/-/reflect-metadata-0.1.13.tgz",
+      "integrity": "sha512-Ts1Y/anZELhSsjMcU605fU9RE4Oi3p5ORujwbIKXfWa+0Zxs510Qrmrce5/Jowq3cHSZSJqBjypxmHarc+vEWg=="
+    },
     "regexpp": {
       "version": "3.2.0",
       "resolved": "https://registry.npmjs.org/regexpp/-/regexpp-3.2.0.tgz",
diff --git a/package.json b/package.json
index d611c05..6f9e943 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@squeebot/core",
-  "version": "3.4.1",
+  "version": "3.5.0",
   "description": "Squeebot v3 core for the execution environment",
   "main": "lib/index.js",
   "types": "lib/index.d.ts",
@@ -30,6 +30,7 @@
   "dependencies": {
     "dateformat": "^4.5.1",
     "fs-extra": "^10.0.0",
+    "reflect-metadata": "^0.1.13",
     "semver": "^7.3.5",
     "tar": "^6.1.11"
   }
diff --git a/src/common/http.ts b/src/common/http.ts
index 7b1c568..4e69f12 100644
--- a/src/common/http.ts
+++ b/src/common/http.ts
@@ -1,7 +1,9 @@
 import http, { RequestOptions } from 'http';
 import https from 'https';
 import fs from 'fs-extra';
+import { createGunzip, createInflate } from 'zlib';
 import { URL } from 'url';
+import { Readable } from 'stream';
 
 /**
  * Create an HTTP GET request.
@@ -87,11 +89,27 @@ export function httpGET(
         reject(new Error('Request took too long!'));
       }, 5000);
 
-      res.on('data', (chunk) => {
+      let output: Readable = res;
+
+      // Decompress GZip
+      if (res.headers['content-encoding'] === 'gzip') {
+        const gzip = createGunzip();
+        res.pipe(gzip);
+        output = gzip;
+      }
+
+      // Deflate
+      if (res.headers['content-encoding'] === 'deflate') {
+        const inflate = createInflate();
+        res.pipe(inflate);
+        output = inflate;
+      }
+
+      output.on('data', (chunk) => {
         data += chunk;
       });
 
-      res.on('end', () => {
+      output.on('end', () => {
         clearTimeout(reqTimeOut);
 
         resolve(data || saveTo);
diff --git a/src/npm/executor.ts b/src/npm/executor.ts
index 0db5ccc..644dd7c 100644
--- a/src/npm/executor.ts
+++ b/src/npm/executor.ts
@@ -65,10 +65,10 @@ export class NPMExecutor {
 
     const pkgRefSplit = pkg.split('@');
     const pkgFullName = (spi === 1 ? '@' : '') + pkgRefSplit[spi];
-    const pkgVersion = this.removeVersionWildcard(pkgRefSplit[spi + 1]);
+    const pkgVersion = this.removeVersionWildcard(pkgRefSplit[spi + 1]) || 'latest';
     const installedVersion = this.installed[pkgFullName];
     if (installedVersion && installedVersion !== 'latest' && pkgVersion !== 'latest') {
-      const cardless = this.removeVersionWildcard(installedVersion);
+      const cardless = this.removeVersionWildcard(installedVersion) as string;
       if (semver.lte(pkgVersion, cardless)) {
         return;
       }
@@ -101,7 +101,7 @@ export class NPMExecutor {
     await this.loadPackageFile();
   }
 
-  private removeVersionWildcard(str: string): string {
-    return str.replace(/\^|>|=/, '');
+  private removeVersionWildcard(str?: string): string | undefined {
+    return str?.replace(/\^|>|=/, '');
   }
 }
diff --git a/src/plugin/decorators/auto.ts b/src/plugin/decorators/auto.ts
index 2196aa9..43e570f 100644
--- a/src/plugin/decorators/auto.ts
+++ b/src/plugin/decorators/auto.ts
@@ -1,14 +1,19 @@
+import 'reflect-metadata';
 
 /**
  * Automatically execute method on plugin initialization
  */
-export function Auto(): (...args: any[]) => void {
+export function Auto() {
   return (
     target: any,
     propertyKey: string,
     descriptor: PropertyDescriptor,
   ) => {
-    descriptor.value.prototype.__autoexec = 1;
+    let autorunners: Array<string> = Reflect.getMetadata('sb:autorunners', target);
+    if (!autorunners) {
+      Reflect.defineMetadata('sb:autorunners', autorunners = [], target);
+    }
+    autorunners.push(propertyKey);
     return descriptor;
   };
 }
diff --git a/src/plugin/decorators/configurable.ts b/src/plugin/decorators/configurable.ts
index 67a57c5..b0c2982 100644
--- a/src/plugin/decorators/configurable.ts
+++ b/src/plugin/decorators/configurable.ts
@@ -1,10 +1,11 @@
+import 'reflect-metadata';
 
 /**
  * Declare this plugin as one that the user can configure.
  * @param defconf Default configuration
  */
-export function Configurable(defconf: any): (...arg: any[]) => any {
-  return (constructor: (...arg: any[]) => any): void => {
-    constructor.prototype.__defconf = defconf;
+export function Configurable(defconf: any) {
+  return (constructor: any): void => {
+    Reflect.defineMetadata('sb:defconf', defconf, constructor);
   };
 }
diff --git a/src/plugin/decorators/dependency.ts b/src/plugin/decorators/dependency.ts
index 16e3aac..0359820 100644
--- a/src/plugin/decorators/dependency.ts
+++ b/src/plugin/decorators/dependency.ts
@@ -1,9 +1,10 @@
+import { Auto } from './auto';
 
 /**
  * Fire the following method automatically when a dependency is (re)loaded.
- * @param dep Name of the dependency
+ * @param dependency Name of the dependency
  */
-export function DependencyLoad(dep: string): (...args: any[]) => void {
+export function DependencyLoad(dependency: string) {
   return (
     target: any,
     propertyKey: string,
@@ -17,23 +18,23 @@ export function DependencyLoad(dep: string): (...args: any[]) => void {
           return;
         }
         const nameof = plugin.manifest.name;
-        if (nameof !== dep) {
+        if (nameof !== dependency) {
           return;
         }
         originalMethod.call(self, plugin);
       });
     };
     // Set the function to be autoexecuted when the plugin is initialized.
-    descriptor.value.prototype.__autoexec = 1;
+    Auto()(target, propertyKey, descriptor);
     return descriptor;
   };
 }
 
 /**
  * Fire the following method automatically when a dependency is unloaded.
- * @param dep Name of the dependency
+ * @param dependency Name of the dependency
  */
-export function DependencyUnload(dep: string): (...args: any[]) => void {
+export function DependencyUnload(dependency: string) {
   return (
     target: any,
     propertyKey: string,
@@ -47,13 +48,14 @@ export function DependencyUnload(dep: string): (...args: any[]) => void {
         if (typeof plugin !== 'string') {
           nameof = plugin.manifest.name;
         }
-        if (nameof !== dep) {
+        if (nameof !== dependency) {
           return;
         }
         originalMethod.call(self, plugin);
       });
     };
-    descriptor.value.prototype.__autoexec = 1;
+    // Set the function to be autoexecuted when the plugin is initialized.
+    Auto()(target, propertyKey, descriptor);
     return descriptor;
   };
 }
diff --git a/src/plugin/decorators/eventlistener.ts b/src/plugin/decorators/eventlistener.ts
index 9c65659..7ed1023 100644
--- a/src/plugin/decorators/eventlistener.ts
+++ b/src/plugin/decorators/eventlistener.ts
@@ -1,9 +1,10 @@
+import { Auto } from './auto';
 
 /**
  * Listen for an event targeted towards this plugin.
  * @param event Event name
  */
-export function EventListener(event: string): (...args: any[]) => void {
+export function EventListener(event: string) {
   return (
     target: any,
     propertyKey: string,
@@ -19,7 +20,7 @@ export function EventListener(event: string): (...args: any[]) => void {
       );
     };
     // Set the function to be autoexecuted when the plugin is initialized.
-    descriptor.value.prototype.__autoexec = 1;
+    Auto()(target, propertyKey, descriptor);
     return descriptor;
   };
 }
diff --git a/src/plugin/decorators/service.ts b/src/plugin/decorators/service.ts
index f877546..07d39f4 100644
--- a/src/plugin/decorators/service.ts
+++ b/src/plugin/decorators/service.ts
@@ -1,10 +1,11 @@
+import 'reflect-metadata';
 
 /**
  * Declare this plugin as one that utilises services.
- * @param servtype Service class, usually a Protocol
+ * @param injectedService Service class, usually a Protocol
  */
-export function InjectService(servtype: any): (...arg: any[]) => any {
-  return (constructor: (...arg: any[]) => any): void => {
-    constructor.prototype.__service = servtype;
+export function InjectService(injectedService: any) {
+  return (constructor: any): void => {
+    Reflect.defineMetadata('sb:service', injectedService, constructor);
   };
 }
diff --git a/src/plugin/manager.ts b/src/plugin/manager.ts
index b786f5b..eb281c1 100644
--- a/src/plugin/manager.ts
+++ b/src/plugin/manager.ts
@@ -1,3 +1,4 @@
+import 'reflect-metadata';
 import * as path from 'path';
 import { IEnvironment, Service } from '../types';
 import { IPlugin, IPluginManifest } from './plugin';
@@ -232,8 +233,8 @@ export class PluginManager {
     }
 
     // Find default configuration, if it's configured, load the configuration
-    if (PluginModule.prototype.__defconf && config) {
-      config.setDefaults(PluginModule.prototype.__defconf);
+    if (Reflect.hasOwnMetadata('sb:defconf', PluginModule) && config) {
+      config.setDefaults(Reflect.getOwnMetadata('sb:defconf', PluginModule));
       await config.load();
     }
 
@@ -242,8 +243,8 @@ export class PluginManager {
     const loaded = new PluginModule(plugin, this.stream, config);
     try {
       // Give the plugin a service
-      if (PluginModule.prototype.__service) {
-        loaded.service = new Service(PluginModule.prototype.__service);
+      if (Reflect.hasOwnMetadata('sb:service', PluginModule)) {
+        loaded.service = new Service(Reflect.getOwnMetadata('sb:service', PluginModule));
       }
 
       // Call the initializer
@@ -252,17 +253,12 @@ export class PluginManager {
       }
 
       // Call methods that are supposed to be executed automatically on load.
-      // This is really nasty and probably shouldn't be done, but I don't care!
-      for (const name of Object.getOwnPropertyNames(PluginModule.prototype)) {
-        // Prevent double initialization
-        if (name === 'initialize') {
-          continue;
-        }
-
-        if (PluginModule.prototype[name] &&
-            PluginModule.prototype[name].prototype &&
-            PluginModule.prototype[name].prototype.__autoexec) {
-          loaded[name].call(loaded);
+      const autorunFunctions: Array<string> = Reflect.getOwnMetadata('sb:autorunners', PluginModule.prototype);
+      if (autorunFunctions?.length) {
+        for (const autoFunction of autorunFunctions) {
+          if (!loaded[autoFunction]) continue;
+          if (autoFunction === 'initialize') continue;
+          loaded[autoFunction].call(loaded);
         }
       }
     } catch (e: any) {
diff --git a/src/util/index.ts b/src/util/index.ts
index e6ababa..a68c67e 100644
--- a/src/util/index.ts
+++ b/src/util/index.ts
@@ -11,7 +11,7 @@ export * from './checksum';
  */
 export function requireNoCache(file: string): object | undefined {
   const fullPath = path.resolve(file);
-  // TODO: maybe use new "import" function?
+  // TODO: maybe use new "import" function? <- currently has no cache invalidation
   // eslint-disable-next-line @typescript-eslint/no-var-requires
   const mod = require(fullPath);
   if (require.cache && require.cache[fullPath]) {