diff --git a/fir_ser/api/utils/app/apputils.py b/fir_ser/api/utils/app/apputils.py
index e8e3331..0304267 100644
--- a/fir_ser/api/utils/app/apputils.py
+++ b/fir_ser/api/utils/app/apputils.py
@@ -157,10 +157,10 @@ def SaveAppInfos(app_file_name, user_obj, appinfo, bundle_id, app_img, short, si
         "app_id": appmobj,
         "icon_url": app_img,
         "release_id": app_file_name.split(".")[0],
-        "build_version": appinfo.get("version","latest"),
-        "app_version": appinfo.get("versioncode","latest"),
+        "build_version": str(appinfo.get("version", "latest")),
+        "app_version": str(appinfo.get("versioncode", "latest")),
         "release_type": get_release_type(app_file_name, appinfo),
-        "minimum_os_version": appinfo.get("miniOSversion", 'latest'),
+        "minimum_os_version": str(appinfo.get("miniOSversion", "latest")),
         "binary_size": size,
         "is_master": True,
         "changelog": appinfo.get("changelog", ''),