diff --git a/blockchain-explorer/docs/requirements.txt b/blockchain-explorer/docs/requirements.txt
index 0053539..57c76df 100644
--- a/blockchain-explorer/docs/requirements.txt
+++ b/blockchain-explorer/docs/requirements.txt
@@ -8,7 +8,7 @@ docutils==0.12
 imagesize==0.7.1
 Jinja2==2.10.1
 MarkupSafe==0.23
-Pygments==2.1.3
+Pygments==2.7.4
 pytz==2016.4
 six==1.10.0
 snowballstemmer==1.2.1