diff --git a/requirements.txt b/requirements.txt
index 90d5382..d680c29 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -95,7 +95,7 @@ PyAudio==0.2.11
 pycodestyle==2.3.1
 pycparser==2.18
 pyflakes==1.6.0
-Pygments==2.2.0
+Pygments==2.7.4
 pygorithm==1.0.4
 PyJWT==1.6.4
 pyparsing==2.2.0