diff --git a/back-end/emnd_backend/requirements.txt b/back-end/emnd_backend/requirements.txt
index 5109013..fff0516 100644
--- a/back-end/emnd_backend/requirements.txt
+++ b/back-end/emnd_backend/requirements.txt
@@ -13,7 +13,7 @@ MarkupSafe==1.0
 numpy==1.13.3
 openapi-codec==1.3.2
 pandas==0.21.0
-Pygments==2.2.0
+Pygments==2.7.4
 PyJWT==1.5.3
 python-dateutil==2.6.1
 pytz==2017.3