diff --git a/HTML_Docs/requirements.txt b/HTML_Docs/requirements.txt
index 3eb1bd7..d6af48f 100644
--- a/HTML_Docs/requirements.txt
+++ b/HTML_Docs/requirements.txt
@@ -1 +1 @@
-pip install sphinx_rtd_theme
+sphinx_rtd_theme==0.2.4