diff --git a/container-optimizer/requirements.txt b/container-optimizer/requirements.txt
index 61c96cf..145da2c 100644
--- a/container-optimizer/requirements.txt
+++ b/container-optimizer/requirements.txt
@@ -82,7 +82,7 @@ ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pydot==1.4.1
-Pygments==2.5.2
+Pygments==2.7.4
 PyHive==0.6.2
 pyparsing==2.4.6
 pyrsistent==0.15.7