diff --git a/src/tachyons-background-size.css b/src/tachyons-background-size.css
index dfe5eb5..b509cc7 100644
--- a/src/tachyons-background-size.css
+++ b/src/tachyons-background-size.css
@@ -1,6 +1,6 @@
-@custom-media --breakpoint-not-small screen and (min-width: 48em);
-@custom-media --breakpoint-medium screen and (min-width: 48em) and (max-width: 64em);
-@custom-media --breakpoint-large screen and (min-width: 64em);
+@custom-media --breakpoint-not-small screen and (min-width: 30em);
+@custom-media --breakpoint-medium screen and (min-width: 30em) and (max-width: 60em);
+@custom-media --breakpoint-large screen and (min-width: 60em);
 
 /*