diff --git a/redash/query_runner/clickhouse.py b/redash/query_runner/clickhouse.py
index 9574a6f202..9bc8b3f424 100644
--- a/redash/query_runner/clickhouse.py
+++ b/redash/query_runner/clickhouse.py
@@ -62,7 +62,7 @@ def _get_tables(self, schema):
         return schema.values()
 
     def _send_query(self, data, stream=False):
-        r = requests.post(self.configuration['url'], data=data, stream=stream, params={
+        r = requests.post(self.configuration['url'], data=data.encode("utf-8"), stream=stream, params={
             'user': self.configuration['user'], 'password':  self.configuration['password'],
             'database': self.configuration['dbname']
         })