diff --git a/lib/strategy.js b/lib/strategy.js
index e2cc98f..f558403 100755
--- a/lib/strategy.js
+++ b/lib/strategy.js
@@ -15,7 +15,7 @@ class CognitoExpress {
       this.userPoolId = config.cognitoUserPoolId;
       this.tokenUse = config.tokenUse;
       this.tokenExpiration = config.tokenExpiration || 3600000;
-      this.iss = `https://cognito-idp.${config.region}.amazonaws.com/${this.userPoolId}`;
+      this.iss = config.iss || `https://cognito-idp.${config.region}.amazonaws.com/${this.userPoolId}`;
       this.hasFinishedProcessing = this.init();
       this.pems = {};
     }