diff --git a/requirements.txt b/requirements.txt
index d3f4916..18201fa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -56,7 +56,7 @@ pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pydicom 
 pyface==6.1.2
-Pygments==2.6.1
+Pygments==2.7.4
 pyparsing==2.4.7
 pysurfer==0.11.0
 python-dateutil==2.8.1