diff --git a/requirements.txt b/requirements.txt
index 90dfcad..4745c5e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -13,7 +13,7 @@ Flask-Migrate==1.8.0
 alembic==0.9.9
 Jinja2==2.8
 MarkupSafe==0.23
-Pygments==2.1.3
+Pygments==2.7.4
 SQLAlchemy==1.0.13
 Sphinx==1.4.4
 WTForms==2.1