diff --git a/docs/requirements.txt b/docs/requirements.txt
index 59709ec72117cfac3699f96a07cdb5063798b935..65f5d70c731484931f9b690dba9e6518ad099e7c 100644
--- a/docs/requirements.txt
+++ b/docs/requirements.txt
@@ -1 +1,2 @@
+Sphinx==7.1.2
 sphinx-rtd-theme==2.0.0