diff --git a/sqla_vertica_python/vertica_python.py b/sqla_vertica_python/vertica_python.py
index 674788f..fa913e7 100755
--- a/sqla_vertica_python/vertica_python.py
+++ b/sqla_vertica_python/vertica_python.py
@@ -148,7 +148,7 @@ def _get_server_version_info(self, connection):
         v = connection.scalar("select version()")
         m = re.match(
             '.*Vertica Analytic Database '
-            'v(\d+)\.(\d+)\.(\d)+.*',
+            r'v(\d+)\.(\d+)\.(\d)+.*',
             v)
         if not m:
             raise AssertionError(