diff --git a/app/assets/stylesheets/debates.scss b/app/assets/stylesheets/debates.scss
index f928c457c..1fded1efa 100644
--- a/app/assets/stylesheets/debates.scss
+++ b/app/assets/stylesheets/debates.scss
@@ -218,7 +218,7 @@
     }
 
     .truncate {
-      background: url('truncate.png');
+      background: image-url('truncate.png');
       background-repeat: repeat-x;
       bottom: 0;
       height: 24px;
diff --git a/app/assets/stylesheets/fonts.scss b/app/assets/stylesheets/fonts.scss
index 80d1259a9..cd745545d 100644
--- a/app/assets/stylesheets/fonts.scss
+++ b/app/assets/stylesheets/fonts.scss
@@ -45,12 +45,12 @@
 
 @font-face {
   font-family: 'Open Sans';
-  src: url('opensans-italic.eot');
-  src: url('opensans-italic.eot?#iefix') format('embedded-opentype'),
-       url('opensans-italic.woff2') format('woff2'),
-       url('opensans-italic.woff') format('woff'),
-       url('opensans-italic.ttf') format('truetype'),
-       url('opensans-italic.svg#open_sansitalic') format('svg');
+  src: font-url('opensans-italic.eot');
+  src: font-url('opensans-italic.eot?#iefix') format('embedded-opentype'),
+       font-url('opensans-italic.woff2') format('woff2'),
+       font-url('opensans-italic.woff') format('woff'),
+       font-url('opensans-italic.ttf') format('truetype'),
+       font-url('opensans-italic.svg#open_sansitalic') format('svg');
   font-weight: normal;
   font-style: italic;
 }
@@ -69,12 +69,12 @@
 
 @font-face {
   font-family: 'Open Sans';
-  src: url('opensans-bolditalic.eot');
-  src: url('opensans-bolditalic.eot?#iefix') format('embedded-opentype'),
-       url('opensans-bolditalic.woff2') format('woff2'),
-       url('opensans-bolditalic.woff') format('woff'),
-       url('opensans-bolditalic.ttf') format('truetype'),
-       url('opensans-bolditalic.svg#open_sansbold_italic') format('svg');
+  src: font-url('opensans-bolditalic.eot');
+  src: font-url('opensans-bolditalic.eot?#iefix') format('embedded-opentype'),
+       font-url('opensans-bolditalic.woff2') format('woff2'),
+       font-url('opensans-bolditalic.woff') format('woff'),
+       font-url('opensans-bolditalic.ttf') format('truetype'),
+       font-url('opensans-bolditalic.svg#open_sansbold_italic') format('svg');
   font-weight: bold;
   font-style: italic;
 }
diff --git a/app/assets/stylesheets/participacion.scss b/app/assets/stylesheets/participacion.scss
index 24f266b14..6c498adcc 100644
--- a/app/assets/stylesheets/participacion.scss
+++ b/app/assets/stylesheets/participacion.scss
@@ -225,7 +225,7 @@ h6 {
 // - - - - - - - - - - - - - - - - - - - - - - - - -
 
 header {
-  background: url('header_bg.jpg');
+  background: image-url('header_bg.jpg');
   background-position: 50% 50%;
   background-size: cover;
   color: $text;
@@ -626,7 +626,7 @@ footer {
 // - - - - - - - - - - - - - - - - - - - - - - - - -
 
 .auth-page {
-  background: #065687 url("auth_bg.jpg");
+  background: #065687 image-url("auth_bg.jpg");
   background-repeat: no-repeat;
   background-size: cover;
   padding-top: rem-calc(24);