diff --git a/docs/requirements.txt b/docs/requirements.txt
index e8f0178..841c777 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
 ipygany
-pygments==2.6.1
+pygments==2.7.4
 jupyter-sphinx
 vtk
 meshpy