diff --git a/docs/en_US/release_notes_4_13.rst b/docs/en_US/release_notes_4_13.rst
index 8d90e49f7..ae5ece70c 100644
--- a/docs/en_US/release_notes_4_13.rst
+++ b/docs/en_US/release_notes_4_13.rst
@@ -37,4 +37,5 @@ Bug fixes
 | `Issue #4644 <https://redmine.postgresql.org/issues/4644>`_ -  Fix length and precision enable/disable issue when changing the data type for Domain node.
 | `Issue #4650 <https://redmine.postgresql.org/issues/4650>`_ -  Fix SQL tab issue for Views. It's a regression of compound triggers.
 | `Issue #4657 <https://redmine.postgresql.org/issues/4657>`_ -  Fix PGADMIN_SERVER_JSON_FILE environment variable support in the container.
+| `Issue #4663 <https://redmine.postgresql.org/issues/4663>`_ -  Fix exception in query history for python 2.7.
 | `Issue #4674 <https://redmine.postgresql.org/issues/4674>`_ -  Fix query tool launch error if user name contain html characters.
\ No newline at end of file
diff --git a/web/pgadmin/tools/sqleditor/utils/query_history.py b/web/pgadmin/tools/sqleditor/utils/query_history.py
index 6019aba3b..41c7b974a 100644
--- a/web/pgadmin/tools/sqleditor/utils/query_history.py
+++ b/web/pgadmin/tools/sqleditor/utils/query_history.py
@@ -14,11 +14,12 @@ class QueryHistory:
                     QueryHistoryModel.dbname == dbname) \
             .all()
 
+        # In Python 2.7, rec.query_info has buffer data type. Cast it.
         return make_json_response(
             data={
                 'status': True,
                 'msg': '',
-                'result': [rec.query_info for rec in result]
+                'result': [bytes(rec.query_info) for rec in list(result)]
             }
         )