diff --git a/config/dev.js b/config/dev.js
index 5ca5059..632f11b 100644
--- a/config/dev.js
+++ b/config/dev.js
@@ -139,4 +139,8 @@ module.exports = {
       process.env.FILESTACK_SUBMISSION_CONTAINER ||
       "topcoder-dev-submissions-dmz",
   },
+  /* Time in MS to wait before refreshing challenge details after register
+   * and unregister.  Used to allow API sufficent time to update.
+   */
+  CHALLENGE_DETAILS_REFRESH_DELAY: 3000,
 };
diff --git a/config/prod.js b/config/prod.js
index ab93169..bb2f09b 100644
--- a/config/prod.js
+++ b/config/prod.js
@@ -134,4 +134,8 @@ module.exports = {
       process.env.FILESTACK_SUBMISSION_CONTAINER ||
       "topcoder-dev-submissions-dmz",
   },
+  /* Time in MS to wait before refreshing challenge details after register
+   * and unregister.  Used to allow API sufficent time to update.
+   */
+  CHALLENGE_DETAILS_REFRESH_DELAY: 3000,
 };