diff --git a/HISTORY.md b/HISTORY.md
index eb9d3b19..38788167 100755
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -2,12 +2,15 @@
 
 ## in development:
 
+* **Notable Fixes:**
+    * fixed "transpose" in the APL library, thanks, Brian!
 * **Translation Updates:**
     * Catalan, thanks, Joan!
 
 ### 2021-03-15
 * new dev version
 * Catalan translation update, thanks, Joan!
+* lists, apl: fixed "transpose", thanks, Brian!
 
 ## 6.7.1
 * **Notable Fixes:**
diff --git a/snap.html b/snap.html
index f9beae78..e637d4df 100755
--- a/snap.html
+++ b/snap.html
@@ -13,7 +13,7 @@
         <script src="src/objects.js?version=2021-03-09"></script>
         <script src="src/gui.js?version=2021-03-15"></script>
         <script src="src/paint.js?version=2020-05-17"></script>
-        <script src="src/lists.js?version=2021-03-09"></script>
+        <script src="src/lists.js?version=2021-03-15"></script>
         <script src="src/byob.js?version=2021-03-05"></script>
         <script src="src/tables.js?version=2021-03-05"></script>
         <script src="src/sketch.js?version=2020-07-13"></script>
diff --git a/src/lists.js b/src/lists.js
index b02ae67e..cd941fe9 100644
--- a/src/lists.js
+++ b/src/lists.js
@@ -63,7 +63,7 @@ MorphicPreferences, TableDialogMorph, SpriteBubbleMorph, SpeechBubbleMorph,
 TableFrameMorph, TableMorph, Variable, isSnapObject, Costume, contains, detect,
 ZERO, WHITE*/
 
-modules.lists = '2021-March-09';
+modules.lists = '2021-March-15';
 
 var List;
 var ListWatcherMorph;