diff --git a/HISTORY.md b/HISTORY.md
index c902ad23..89fb3e08 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -17,6 +17,7 @@
 * objects: adjusted block-search-bar for variadic infix reporters
 * objects: adapted formula editor for variadic infix reporters
 * objects: removed scaffolding
+* store: apply block migration dictionary to hidden blocks in microworlds
 
 ### 2022-02-28
 * blocks, objects, threads, store: made addition reporter variadic
diff --git a/snap.html b/snap.html
index 23bebfe4..0fb94c67 100755
--- a/snap.html
+++ b/snap.html
@@ -30,7 +30,7 @@
         <script src="src/maps.js?version=2021-06-15"></script>
         <script src="src/extensions.js?version=2022-02-08"></script>
         <script src="src/xml.js?version=2021-07-05"></script>
-        <script src="src/store.js?version=2022-02-28"></script>
+        <script src="src/store.js?version=2022-03-01"></script>
         <script src="src/locale.js?version=2022-02-28"></script>
         <script src="src/cloud.js?version=2021-02-04"></script>
         <script src="src/api.js?version=2022-01-03"></script>
diff --git a/src/store.js b/src/store.js
index 402e317f..4c263b68 100644
--- a/src/store.js
+++ b/src/store.js
@@ -63,7 +63,7 @@ Project*/
 
 // Global stuff ////////////////////////////////////////////////////////
 
-modules.store = '2022-February-28';
+modules.store = '2022-March-01';
 
 // XML_Serializer ///////////////////////////////////////////////////////
 /*
@@ -468,8 +468,11 @@ SnapSerializer.prototype.loadScene = function (xmlNode, remixID) {
     if (model.hiddenPrimitives) {
         model.hiddenPrimitives.contents.split(' ').forEach(
             sel => {
+                var selector, migration;
                 if (sel) {
-                    scene.hiddenPrimitives[sel] = true;
+                    migration = SpriteMorph.prototype.blockMigrations[sel];
+                    selector = migration ? migration.selector : sel;
+                    scene.hiddenPrimitives[selector] = true;
                 }
             }
         );