diff --git a/requirements.txt b/requirements.txt
index 1d8b4ec..8fa6d4f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -45,7 +45,7 @@ prompt-toolkit==2.0.7
 ptyprocess==0.6.0
 py==1.7.0
 pydicom==1.2.1
-Pygments==2.3.1
+Pygments==2.7.4
 pyparsing==2.3.0
 pytest==4.1.1
 python-dateutil==2.7.5