diff --git a/.themes/classic/sass/base/_theme.scss b/.themes/classic/sass/base/_theme.scss
index 75ff8e7..3953fe3 100644
--- a/.themes/classic/sass/base/_theme.scss
+++ b/.themes/classic/sass/base/_theme.scss
@@ -69,7 +69,7 @@ aside[role=sidebar] a {
   @include link-colors($sidebar-link-color, $hover: $sidebar-link-color-hover, $focus: $sidebar-link-color-hover, $active: $sidebar-link-color-active);
 }
 a {
-  @include transition(color, .3s);
+  @include transition(color .3s);
 }
 
 html {
diff --git a/.themes/classic/sass/partials/_blog.scss b/.themes/classic/sass/partials/_blog.scss
index ab9033f..8894755 100644
--- a/.themes/classic/sass/partials/_blog.scss
+++ b/.themes/classic/sass/partials/_blog.scss
@@ -108,7 +108,7 @@ article + article {
     text-decoration: none;
     color: mix($text-color, $text-color-light);
     @extend .serif;
-    @include transition(background-color, .5s);
+    @include transition(background-color .5s);
     &:hover {
       background: $link-color-hover;
       text-shadow: none;
diff --git a/.themes/classic/sass/partials/sidebar/_base.scss b/.themes/classic/sass/partials/sidebar/_base.scss
index 90ec7b6..3b238a9 100644
--- a/.themes/classic/sass/partials/sidebar/_base.scss
+++ b/.themes/classic/sass/partials/sidebar/_base.scss
@@ -34,7 +34,7 @@ aside[role=sidebar] {
   }
   a {
     color: inherit;
-    @include transition(color, .5s);
+    @include transition(color .5s);
   }
   &:hover a {
     color: $sidebar-link-color;