diff --git a/app/index.html b/app/index.html
index 1c1b3de..2aa29f4 100644
--- a/app/index.html
+++ b/app/index.html
@@ -271,7 +271,7 @@
                           
                           <div style="border-top: solid 1px #ddd" onClick="$('#to_upload').val('');">
                               <label for="to_upload" class="button_text">A TabsOutliner export</label>
-                              <input type="file" id="to_upload" name="to_upload" accept=".tree"
+                              <input type="file" id="to_upload" name="to_upload" accept=".tree,.json"
                                      style="display:none" onchange="importTabsOutliner()">
                           </div>
                       </div>
diff --git a/versions/Release-Candidate/app/index.html b/versions/Release-Candidate/app/index.html
index 1c1b3de..2aa29f4 100644
--- a/versions/Release-Candidate/app/index.html
+++ b/versions/Release-Candidate/app/index.html
@@ -271,7 +271,7 @@
                           
                           <div style="border-top: solid 1px #ddd" onClick="$('#to_upload').val('');">
                               <label for="to_upload" class="button_text">A TabsOutliner export</label>
-                              <input type="file" id="to_upload" name="to_upload" accept=".tree"
+                              <input type="file" id="to_upload" name="to_upload" accept=".tree,.json"
                                      style="display:none" onchange="importTabsOutliner()">
                           </div>
                       </div>