diff --git a/requirements.txt b/requirements.txt
index 65d5a294..8ccf4eec 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -23,7 +23,7 @@ stevedore>=1.3.0
 tzlocal>=1.1.2
 email>=4.0.2;python_version<'3.0'
 Jinja2>=2.7.3
-PyMySQL>=0.6.2,!=0.6.4,<0.7.7
+PyMySQL>=0.6.2,!=0.6.4
 apscheduler>=3.0.1,<3.1.0
 python_dateutil>=2.4.0
 oslo.concurrency>=3.8.0         # Apache-2.0