diff --git a/requirements.txt b/requirements.txt
index 235e4f7..bd029ad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ mock==2.0.0
 pbr==3.1.1
 py==1.4.34
 pycparser==2.18
-Pygments==2.2.0
+Pygments==2.7.4
 pyOpenSSL==17.2.0
 pytest==3.2.0
 pytest-sugar==0.8.0