diff --git a/docs/docs_requirements.txt b/docs/docs_requirements.txt
index 9929249..0c435ed 100644
--- a/docs/docs_requirements.txt
+++ b/docs/docs_requirements.txt
@@ -1,3 +1,3 @@
 Sphinx==1.8.1
-Pygments==2.2.0
+Pygments==2.7.4
 Sphinx==1.8.1