diff --git a/changelog.md b/changelog.md
index 0cc6a6b..277ab98 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 2024-09-05 - 5.2.8 - fix(smartdata.classes.doc)
+Fix key handling in convertFilterForMongoDb function
+
+- Fixed an issue in convertFilterForMongoDb that allowed keys with dots which could cause errors.
+
 ## 2024-09-05 - 5.2.7 - fix(core)
 Fixed issue with handling filter keys containing dots in smartdata.classes.doc.ts
 
diff --git a/ts/00_commitinfo_data.ts b/ts/00_commitinfo_data.ts
index c31afde..01f6684 100644
--- a/ts/00_commitinfo_data.ts
+++ b/ts/00_commitinfo_data.ts
@@ -3,6 +3,6 @@
  */
 export const commitinfo = {
   name: '@push.rocks/smartdata',
-  version: '5.2.7',
+  version: '5.2.8',
   description: 'An advanced library for NoSQL data organization and manipulation using TypeScript with support for MongoDB, data validation, collections, and custom data types.'
 }
diff --git a/ts/smartdata.classes.doc.ts b/ts/smartdata.classes.doc.ts
index c83cb24..b0fc70a 100644
--- a/ts/smartdata.classes.doc.ts
+++ b/ts/smartdata.classes.doc.ts
@@ -60,8 +60,7 @@ export const convertFilterForMongoDb = (filterArg: { [key: string]: any }) => {
           convertedFilter[keyPathArg2] = filterArg2;
           return;
         } else if (key.includes('.')) {
-          convertedFilter[keyPathArg2] = filterArg2;
-          return;
+          throw new Error('keys cannot contain dots');
         }
       }
       for (const key of Object.keys(filterArg2)) {