diff --git a/backend/CHAT_SERVER/requirements.txt b/backend/CHAT_SERVER/requirements.txt
index a91a7c3..fd16a28 100644
--- a/backend/CHAT_SERVER/requirements.txt
+++ b/backend/CHAT_SERVER/requirements.txt
@@ -31,7 +31,7 @@ ptyprocess==0.6.0
 pyasn1==0.4.8
 pyasn1-modules==0.2.8
 pycparser==2.19
-Pygments==2.5.2
+Pygments==2.7.4
 PyHamcrest==2.0.0
 pyOpenSSL==19.1.0
 pytz==2019.3