diff --git a/docs/environment.yml b/docs/environment.yml
index c1413de15..e2aaf706e 100644
--- a/docs/environment.yml
+++ b/docs/environment.yml
@@ -6,7 +6,7 @@ dependencies:
   - fenics
   - matplotlib==3.7.1
   - pip>=20.1
-  - sphinx==7
+  - sphinx==7.4.3
   - folium
   - numpy==1.24
   - sympy