diff --git a/lib/reducers/message-reducer.js b/lib/reducers/message-reducer.js
--- a/lib/reducers/message-reducer.js
+++ b/lib/reducers/message-reducer.js
@@ -1236,6 +1236,57 @@
         ) {
           media.push({ ...singleMedia, ...mediaUpdate });
           replaced = true;
+        } else if (
+          singleMedia.type === 'photo' &&
+          mediaUpdate.type === 'encrypted_photo'
+        ) {
+          // extract fields that are absent in encrypted_photo type
+          const { uri, localMediaSelection, ...original } = singleMedia;
+          const { holder, encryptionKey, ...update } = mediaUpdate;
+          invariant(
+            holder && encryptionKey,
+            'holder and encryptionKey are required for encrypted_photo message',
+          );
+          media.push({
+            ...original,
+            ...update,
+            type: 'encrypted_photo',
+            holder,
+            encryptionKey,
+          });
+          replaced = true;
+        } else if (
+          singleMedia.type === 'video' &&
+          mediaUpdate.type === 'encrypted_video'
+        ) {
+          const { uri, thumbnailURI, localMediaSelection, ...original } =
+            singleMedia;
+          const {
+            holder,
+            encryptionKey,
+            thumbnailHolder,
+            thumbnailEncryptionKey,
+            ...update
+          } = mediaUpdate;
+          invariant(
+            holder && encryptionKey,
+            'holder and encryptionKey are required for encrypted_video message',
+          );
+          invariant(
+            thumbnailHolder && thumbnailEncryptionKey,
+            'thumbnailHolder and thumbnailEncryptionKey are required for ' +
+              'encrypted_video message',
+          );
+          media.push({
+            ...original,
+            ...update,
+            type: 'encrypted_video',
+            holder,
+            encryptionKey,
+            thumbnailHolder,
+            thumbnailEncryptionKey,
+          });
+          replaced = true;
         }
       }
       updatedMessage = { ...message, media };