diff --git a/index.html b/index.html
index a5918a9..f7269a6 100644
--- a/index.html
+++ b/index.html
@@ -86,7 +86,7 @@
             </p>
         </div>
         <div class="mdl-dialog__actions">
-            <button type="button" class="mdl-button mdl-js-button mdl-button--raised mdl-button--colored" id="CancelPairingDialog">Cancel</button>
+            <button type="button" class="mdl-button mdl-js-button mdl-button--raised mdl-button--colored" id="cancelPairingDialog">Cancel</button>
         </div>
     </dialog>
 
@@ -98,8 +98,8 @@
             </p>
         </div>
         <div class="mdl-dialog__actions">
-            <button type="button" class="mdl-button mdl-js-button mdl-button--raised mdl-button--colored" id="CancelReplaceApp">No</button>
-            <button type="button" class="mdl-button mdl-js-button mdl-button--raised mdl-button--colored" id="ContinueReplaceApp">Yes</button>
+            <button type="button" class="mdl-button mdl-js-button mdl-button--raised mdl-button--colored" id="cancelReplaceApp">No</button>
+            <button type="button" class="mdl-button mdl-js-button mdl-button--raised mdl-button--colored" id="continueReplaceApp">Yes</button>
         </div>
     </dialog>
 
diff --git a/static/js/index.js b/static/js/index.js
index 99f1f9c..fa11ced 100644
--- a/static/js/index.js
+++ b/static/js/index.js
@@ -15,8 +15,8 @@ function attachListeners() {
     $('#showAppsButton').on('click', showAppsPushed);
     $('#selectGame').on('change', gameSelectUpdated);
     $('#startGameButton').on('click', startSelectedGame);
-    $('#CancelReplaceApp').on('click', cancelReplaceApp);
-    $('#ContinueReplaceApp').on('click', continueReplaceApp);
+    $('#cancelReplaceApp').on('click', cancelReplaceApp);
+    $('#continueReplaceApp').on('click', continueReplaceApp);
     $('#quitGameButton').on('click', stopGame);
     $(window).resize(fullscreenNaclModule);
 }