diff --git a/15.rl_learning/requirements.txt b/15.rl_learning/requirements.txt
index f7c728d..3b428e6 100644
--- a/15.rl_learning/requirements.txt
+++ b/15.rl_learning/requirements.txt
@@ -32,7 +32,7 @@ prompt-toolkit==3.0.4
 protobuf==3.11.3
 ptyprocess==0.6.0
 pyglet==1.5.0
-Pygments==2.6.1
+Pygments==2.7.4
 pyparsing==2.4.6
 python-dateutil==2.8.1
 pytz==2019.3