diff --git a/modules/primer-blankslate/lib/blankslate.scss b/modules/primer-blankslate/lib/blankslate.scss
index d5cd35641a..6e20b27d18 100644
--- a/modules/primer-blankslate/lib/blankslate.scss
+++ b/modules/primer-blankslate/lib/blankslate.scss
@@ -33,7 +33,7 @@
 }
 
 .blankslate-narrow {
-  width: 485px;
+  max-width: 485px;
   margin: 0 auto;
 }