diff --git a/backend/model/sql/SharingManager.ts b/backend/model/sql/SharingManager.ts
index 7c87e0c3..c2bbb967 100644
--- a/backend/model/sql/SharingManager.ts
+++ b/backend/model/sql/SharingManager.ts
@@ -44,7 +44,11 @@ export class SharingManager implements ISharingManager {
     if (sharing.timeStamp < Date.now() - Config.Server.sharing.updateTimeout) {
       throw "Sharing is locked, can't update anymore"
     }
-    sharing.password = PasswordHelper.cryptPassword(inSharing.password);
+    if (inSharing.password == null) {
+      sharing.password = null;
+    } else {
+      sharing.password = PasswordHelper.cryptPassword(inSharing.password);
+    }
     sharing.includeSubfolders = inSharing.includeSubfolders;
     sharing.expires = inSharing.expires;