diff --git a/docs/rtd-requirements.txt b/docs/rtd-requirements.txt
index 58c1b5d..7bcff49 100644
--- a/docs/rtd-requirements.txt
+++ b/docs/rtd-requirements.txt
@@ -18,7 +18,7 @@ pexpect==4.8.0
 pickleshare==0.7.5
 prompt-toolkit==3.0.20
 ptyprocess==0.7.0
-Pygments==2.10.0
+Pygments==2.15.0
 pyparsing==2.4.7
 pytz==2021.1
 pyzmq==22.3.0