diff --git a/package.json b/package.json
index a045539a..649af1ea 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": "1000.22.2",
+  "version": "1000.22.3",
   "dependencies": {
     "auth0-js": "^6.8.4",
     "config": "^3.2.0",
diff --git a/src/services/challenges.js b/src/services/challenges.js
index c3391cc8..d3e4b3c8 100644
--- a/src/services/challenges.js
+++ b/src/services/challenges.js
@@ -590,7 +590,7 @@ class ChallengesService {
     const roleId = await this.getRoleId('Submitter');
     const params = {
       challengeId,
-      memberHandle: user.handle,
+      memberHandle: encodeURIComponent(user.handle),
       roleId,
     };
     const res = await this.private.apiV5.postJson('/resources', params);
@@ -608,7 +608,7 @@ class ChallengesService {
     const roleId = await this.getRoleId('Submitter');
     const params = {
       challengeId,
-      memberHandle: user.handle,
+      memberHandle: encodeURIComponent(user.handle),
       roleId,
     };
     const res = await this.private.apiV5.delete('/resources', JSON.stringify(params));