diff --git a/backend/Yiqi/Yiqi/requirements.txt b/backend/Yiqi/Yiqi/requirements.txt
index 2971ec8..c4ded7a 100644
--- a/backend/Yiqi/Yiqi/requirements.txt
+++ b/backend/Yiqi/Yiqi/requirements.txt
@@ -101,7 +101,7 @@ pycrypto==2.6.1
 pycryptodome==3.6.0
 PyDispatcher==2.0.5
 pygame==1.9.3
-Pygments==2.2.0
+Pygments==2.7.4
 PyJWT==1.6.1
 PyMySQL==0.8.0
 pyOpenSSL==17.5.0