diff --git a/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css b/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css
index b667fe7911e9..252764490474 100644
--- a/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css
+++ b/packages/docusaurus-theme-classic/src/theme/Layout/styles.module.css
@@ -11,7 +11,7 @@ body {
 }
 
 .mainWrapper {
-  flex: 1 0 auto;
+  flex: 1 0 none;
 }
 
 /* Docusaurus-specific utility class */