diff --git a/requirements.txt b/requirements.txt
index 166d6f2..cd7628b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -16,7 +16,7 @@ pexpect==4.8.0
 pickleshare==0.7.5
 prompt-toolkit==3.0.3
 ptyprocess==0.6.0
-Pygments==2.5.2
+Pygments==2.7.4
 pysam==0.15.4
 python-dateutil==2.8.1
 pyzmq==18.1.1