diff --git a/requirements.txt b/requirements.txt
index 303ee03..e291783 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ flake8==3.3.0
 httptools==0.0.11
 mccabe==0.6.1
 packaging==16.8
-prometheus_client==0.7.1
+prometheus_client>=0.7.1
 protobuf-py3==2.5.1
 psutil==5.6.6
 pycodestyle==2.3.1