diff --git a/docs/environment_docs.yml b/docs/environment_docs.yml
index 1effcf3da0..a1c5c2a7e4 100644
--- a/docs/environment_docs.yml
+++ b/docs/environment_docs.yml
@@ -36,3 +36,7 @@ dependencies:
     - pooch
     - icartt
     - cmweather
+    - sphinxcontrib-devhelp==1.0.5
+    - sphinxcontrib-htmlhelp==2.0.4
+    - sphinxcontrib-qthelp==1.0.6
+    - sphinxcontrib-serializinghtml==1.1.9