diff --git a/src/utils.scss b/src/utils.scss
index c579f6a..90da90b 100644
--- a/src/utils.scss
+++ b/src/utils.scss
@@ -26,7 +26,7 @@ $media-queries: ();
   @if $next-breakpoint-index <= length($breakpoint-sizes) {
     $next-breakpoint-size: nth($breakpoint-sizes, $next-breakpoint-index);
     $media-queries: map-merge($media-queries, (
-      '#{$name}-down': 'max-width: #{$next-breakpoint-size}'
+      '#{$name}-down': 'max-width: #{calc($next-breakpoint-size - 1px)}'
     ));
   }
 }
diff --git a/yarn.lock b/yarn.lock
index 9cf3763..718876e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -454,8 +454,8 @@ load-json-file@^1.0.0:
     strip-bom "^2.0.0"
 
 lodash@^4.0.0, lodash@^4.17.11, lodash@~4.17.10:
-  version "4.17.14"
-  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.14.tgz#9ce487ae66c96254fe20b599f21b6816028078ba"
+  version "4.17.19"
+  resolved "https://registry.yarnpkg.com/lodash/-/lodash-4.17.19.tgz#e48ddedbe30b3321783c5b4301fbd353bc1e4a4b"
 
 loud-rejection@^1.0.0:
   version "1.6.0"