diff --git a/requirements.txt b/requirements.txt
index 9e90d54..b286ad2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -63,7 +63,7 @@ pycapnp==0.6.1
 pycodestyle==2.3.1
 pycparser==2.14
 pyflakes==1.5.0
-Pygments==2.1
+Pygments==2.7.4
 pyparsing==2.2.0
 pytest==3.2.1
 pytest-benchmark==3.1.1