diff --git a/requirements.txt b/requirements.txt
index fcaba8a..a2a79be 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ pydicom==1.4.2
 pydot==1.4.1
 pydotplus==2.0.2
 pyflakes==2.1.1
-Pygments==2.6.1
+Pygments==2.7.4
 PyNaCl==1.3.0
 pyOpenSSL==19.1.0
 pyparsing==2.4.7