diff --git a/mslib/mscolab/models.py b/mslib/mscolab/models.py
index 742583fb7..88af3b76f 100644
--- a/mslib/mscolab/models.py
+++ b/mslib/mscolab/models.py
@@ -216,5 +216,5 @@ def __init__(self, op_id, u_id, commit_hash, version_name=None, comment=None):
         self.op_id = int(op_id)
         self.u_id = int(u_id)
         self.commit_hash = str(commit_hash)
-        self.version_name = str(version_name)
-        self.comment = str(comment)
+        self.version_name = version_name
+        self.comment = comment