diff --git a/src/services/ChallengeService.js b/src/services/ChallengeService.js
index dbe71f4c..998cda2b 100644
--- a/src/services/ChallengeService.js
+++ b/src/services/ChallengeService.js
@@ -710,7 +710,7 @@ async function searchChallenges(currentUser, criteria) {
               [sortByProp]: {
                 order: sortOrderProp,
                 missing: "_last",
-                unmapped_type: "text",
+                unmapped_type: "keyword",
               },
             },
       ],