diff --git a/lib/Authority.ts b/lib/Authority.ts
index d6e303b..4e50987 100644
--- a/lib/Authority.ts
+++ b/lib/Authority.ts
@@ -53,7 +53,7 @@ class Authority {
       key,
       (info) => {
         try {
-          return keystore.get_key (info.iat / 1000, info.iss);
+          return await keystore.get_key (info.iat / 1000, info.iss);
         }
         catch {
           return '';
diff --git a/package.json b/package.json
index b9e80f7..713c4fd 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@sapphirecode/auth-server-helper",
-  "version": "3.3.1",
+  "version": "3.3.2",
   "main": "dist/lib/index.js",
   "author": {
     "name": "Timo Hocker",