diff --git a/client/src/templates/Challenges/components/CompletionModal.js b/client/src/templates/Challenges/components/CompletionModal.js
index 3aa07bdf3c..4cf589c97d 100644
--- a/client/src/templates/Challenges/components/CompletionModal.js
+++ b/client/src/templates/Challenges/components/CompletionModal.js
@@ -39,6 +39,7 @@ const mapDispatchToProps = function(dispatch) {
     close: () => dispatch(closeModal('completion')),
     handleKeypress: e => {
       if (e.keyCode === 13 && (e.ctrlKey || e.metaKey)) {
+        e.preventDefault();
         dispatch(submitChallenge());
       }
     },