diff --git a/setup.cfg b/setup.cfg
index 373b06da..1408884d 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -53,7 +53,7 @@ dev =
     zest.releaser>=6.20.1
 
 doc =
-    Sphinx==4.0.2
+    Sphinx==4.0.3
     docutils==0.17.1
 
 [options.entry_points]