diff --git a/MIGRATING.md b/MIGRATING.md
index b625219fe..ea5b67c8d 100644
--- a/MIGRATING.md
+++ b/MIGRATING.md
@@ -49,12 +49,12 @@ pub fn migrate(deps: DepsMut, _env: Env, _msg: Empty) -> Result<Response, Contra
 
     // Remove the old map keys
     for (k, _) in current.iter() {
-      signed_int_map.remove(deps.storage, IntKeyOld::<i8>::from(*k));
+      signed_int_map.remove(deps.storage, (*k).into());
     }
 
     // Save in new format
-    for (k, v) in current.iter() {
-      signed_int_map_new.save(deps.storage, *k, v)?;
+    for (k, v) in current.into_iter() {
+      signed_int_map_new.save(deps.storage, k, &v)?;
     }
 
     // Confirm old map is empty
diff --git a/packages/storage-plus/src/map.rs b/packages/storage-plus/src/map.rs
index a04015465..94d78bdcd 100644
--- a/packages/storage-plus/src/map.rs
+++ b/packages/storage-plus/src/map.rs
@@ -685,19 +685,18 @@ mod test {
 
         // remove old entries
         for (k, _) in current.iter() {
-            SIGNED_ID_OLD.remove(&mut store, IntKeyOld::<i32>::from(*k));
+            SIGNED_ID_OLD.remove(&mut store, (*k).into());
         }
 
         // confirm map is empty
         assert!(SIGNED_ID_OLD
             .range(&store, None, None, Order::Ascending)
-            .collect::<StdResult<Vec<_>>>()
-            .unwrap()
-            .is_empty());
+            .next()
+            .is_none());
 
         // save in new format
-        for (k, v) in current.iter() {
-            SIGNED_ID.save(&mut store, *k, v).unwrap();
+        for (k, v) in current.into_iter() {
+            SIGNED_ID.save(&mut store, k, &v).unwrap();
         }
 
         // obtain new keys