diff --git a/h/assets.yaml b/h/assets.yaml
index 1ba25afea57..0bc3e6a0ea7 100644
--- a/h/assets.yaml
+++ b/h/assets.yaml
@@ -87,7 +87,6 @@ admin_css:
       filters:
       - compass
       - cleancss
-      - cssrewrite
       contents:
         - h:static/styles/admin.scss
 admin_js:
@@ -145,7 +144,6 @@ app_css:
   output: styles/app.min.css
   filters:
     - cleancss
-    - cssrewrite
   contents:
     - h:static/styles/vendor/angular-csp.css
     - h:static/styles/vendor/angular-toastr.css
@@ -199,7 +197,6 @@ inject_css:
   output: styles/hypothesis.min.css
   filters:
     - cleancss
-    - cssrewrite
   contents:
     - h:static/styles/vendor/icomoon.css
     - output: styles/hypothesis.css
@@ -220,7 +217,6 @@ help_page_css:
   output: styles/help-page.min.css
   filters:
     - cleancss
-    - cssrewrite
   contents:
     - h:static/styles/vendor/icomoon.css
     - output: styles/help-page.css
diff --git a/h/static/styles/base.scss b/h/static/styles/base.scss
index 8944769a555..4b229dc935b 100644
--- a/h/static/styles/base.scss
+++ b/h/static/styles/base.scss
@@ -28,7 +28,7 @@
 //NOISE///////////
 //Provides the noise background
 .noise {
-  background: url("../images/noise_1.png");
+  background: image-url("images/noise_1.png");
 }
 
 .annotator-hide {
diff --git a/h/static/styles/help-page.scss b/h/static/styles/help-page.scss
index f502eece77e..890548c9332 100644
--- a/h/static/styles/help-page.scss
+++ b/h/static/styles/help-page.scss
@@ -103,7 +103,7 @@ body {
 }
 
 #help-2 {
-  background: url(../images/help-arrow.svg) 0 0 no-repeat;
+  background: image-url("images/help-arrow.svg") 0 0 no-repeat;
   width: 60px;
   height: 45px;
   position: absolute;