diff --git a/docs/requirements.txt b/docs/requirements.txt
index 6249d91..7c70ff7 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,5 +1,5 @@
-sphinx-book-theme==1.1.2
+sphinx-book-theme==1.0.1
 sphinx-copybutton==0.5.2
-sphinxext-opengraph==0.9.1
+sphinxext-opengraph==0.8.2
 sphinx-togglebutton==0.3.2
 m2r==0.3.1