diff --git a/arkindex/ponos/models.py b/arkindex/ponos/models.py
index 8ede5e8e428ea26f02c43c83395cedbdec9d7ac4..930ce597d8a2eed88a86287349654c8d83a2e302 100644
--- a/arkindex/ponos/models.py
+++ b/arkindex/ponos/models.py
@@ -612,7 +612,7 @@ def task_token_default():
 
     :rtype: str
     """
-    return base64.encodebytes(uuid.uuid4().bytes).strip()
+    return base64.encodebytes(uuid.uuid4().bytes).strip().decode('utf-8')
 
 
 class Task(models.Model):