diff --git a/requirements.txt b/requirements.txt
index ac08184c5..dfe4ff888 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ python-ironic-inspector-client>=1.5.0 # Apache-2.0
 python-zaqarclient>=1.0.0 # Apache-2.0
 PyYAML>=3.10.0 # MIT
 requests>=2.10.0 # Apache-2.0
-tenacity>=3.2.1  # Apache-2.0
+tenacity>=3.2.1 # Apache-2.0
 setuptools!=24.0.0,>=16.0 # PSF/ZPL
 six>=1.9.0 # MIT
 SQLAlchemy<1.1.0,>=1.0.10 # MIT