diff --git a/CHANGES b/CHANGES
index 80c29222029..d5b70bccbeb 100644
--- a/CHANGES
+++ b/CHANGES
@@ -4,6 +4,9 @@ Release 4.1.1 (in development)
 Dependencies
 ------------
 
+* #9434: sphinxcontrib-htmlhelp-2.0.0 or above
+* #9434: sphinxcontrib-serializinghtml-1.1.5 or above
+
 Incompatible changes
 --------------------
 
diff --git a/setup.py b/setup.py
index 206ff4ad490..4a1d5aeedf7 100644
--- a/setup.py
+++ b/setup.py
@@ -18,8 +18,8 @@
     'sphinxcontrib-applehelp',
     'sphinxcontrib-devhelp',
     'sphinxcontrib-jsmath',
-    'sphinxcontrib-htmlhelp',
-    'sphinxcontrib-serializinghtml',
+    'sphinxcontrib-htmlhelp>=2.0.0',
+    'sphinxcontrib-serializinghtml>=1.1.5',
     'sphinxcontrib-qthelp',
     'Jinja2>=2.3',
     'Pygments>=2.0',