diff --git a/docs/environment.yml b/docs/environment.yml
index 6285c37d..e7c65503 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -23,7 +23,7 @@ dependencies:
   - quarto
   - sacc>=0.11
   - scipy
-  - sphinx
+  - sphinx=7.1.2
   - sphinx-autoapi
   - sphinx-autodoc-typehints
   - sphinxcontrib-apidoc
diff --git a/environment.yml b/environment.yml
index 5c2fae89..bdb76c1c 100644
--- a/environment.yml
+++ b/environment.yml
@@ -36,6 +36,6 @@ dependencies:
   - requests
   - sacc >= 0.11
   - scipy
-  - sphinx
+  - sphinx=7.1.2
   - types-pyyaml
   - urllib3