diff --git a/requirements-dev.txt b/requirements-dev.txt
old mode 100755
new mode 100644
index 66c52e4..333ea91
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -5,7 +5,7 @@ pytest-cov==2.3.1
 pydocstyle==1.0.0
 pytest==3.0.3
 py==1.4.31
-pygments==2.1.3
+pygments==2.7.4
 mock==2.0.0
 requests==2.11.1
 grpcio-tools==1.4.0