diff --git a/rsconcept/frontend/src/styling/setup.css b/rsconcept/frontend/src/styling/setup.css
index 4a6b94a0..601ac355 100644
--- a/rsconcept/frontend/src/styling/setup.css
+++ b/rsconcept/frontend/src/styling/setup.css
@@ -54,7 +54,7 @@ html {
   }
 }
 
-@media only screen and (max-width: 640px) {
+@media only screen and (max-width: 639px) {
   :root {
     font-size: 12px;
   }