diff --git a/dendronet_legacy/requirements.txt b/dendronet_legacy/requirements.txt
index cda78a0..3331854 100644
--- a/dendronet_legacy/requirements.txt
+++ b/dendronet_legacy/requirements.txt
@@ -63,7 +63,7 @@ pycairo==1.16.2
 pycrypto==2.6.1
 pycups==1.9.73
 pydot==1.2.3
-Pygments==2.2.0
+Pygments==2.7.4
 pygobject==3.26.1
 pymacaroons==0.13.0
 PyNaCl==1.1.2