diff --git a/docs/requirements.txt b/docs/requirements.txt
index 0b266552..5f87dce1 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1,3 +1,5 @@
-sphinx-gallery
-sphinxcontrib-bibtex
+sphinx-gallery==0.14.0
+sphinxcontrib-bibtex==2.6.1
+sphinx==5.3.0
 sphinx-design==0.3.0
+sphinx_rtd_theme==1.3.0