diff --git a/package.json b/package.json
index 8e3d3a8..6650596 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
     "lint:js": "./node_modules/.bin/eslint --ext .js,.jsx .",
     "test": "npm run lint && npm run jest"
   },
-  "version": "1.2.0",
+  "version": "1.2.1",
   "dependencies": {
     "auth0-js": "^6.8.4",
     "config": "^3.2.0",
diff --git a/src/services/challenges.js b/src/services/challenges.js
index 7c02078..08b7c42 100644
--- a/src/services/challenges.js
+++ b/src/services/challenges.js
@@ -453,12 +453,15 @@ class ChallengesService {
    */
   async getChallengeRegistrants(challengeId) {
     /* If no token provided, resource will return Submitter role only */
-    const roleId = this.private.tokenV3 ? await this.getRoleId('Submitter') : '';
-    const params = {
+    const roleId = this.private.tokenV3 ? await this.getRoleId('Submitter') : null;
+    let params = {
       challengeId,
-      roleId,
     };
 
+    if (roleId) {
+      params = { ...params, roleId };
+    }
+
     let registrants = await this.private.apiV5.get(`/resources?${qs.stringify(params)}`)
       .then(checkErrorV5).then(res => res.result);