diff --git a/distr/fira_code.css b/distr/fira_code.css
index fc6a4bd..58f2ea9 100644
--- a/distr/fira_code.css
+++ b/distr/fira_code.css
@@ -1,32 +1,40 @@
 @font-face {
   font-family: 'Fira Code';
-  src: url('woff2/FiraCode-Light.woff2') format('woff2');
+  src: url('woff2/FiraCode-Light.woff2') format('woff2'),
+    url("woff2/FiraCode-Light.woff") format("woff");
   font-weight: 300;
   font-style: normal;
 }
 
 @font-face {
   font-family: 'Fira Code';
-  src: url('woff2/FiraCode-Regular.woff2') format('woff2');
+  src: url('woff2/FiraCode-Regular.woff2') format('woff2'),
+    url("woff2/FiraCode-Regular.woff") format("woff");
   font-weight: 400;
   font-style: normal;
 }
 
 @font-face {
   font-family: 'Fira Code';
-  src: url('woff2/FiraCode-Medium.woff2') format('woff2');
+  src: url('woff2/FiraCode-Medium.woff2') format('woff2'),
+    url("woff2/FiraCode-Medium.woff") format("woff");
   font-weight: 500;
   font-style: normal;
 }
 
 @font-face {
   font-family: 'Fira Code';
-  src: url('woff2/FiraCode-Bold.woff2') format('woff2');
+  src: url('woff2/FiraCode-Bold.woff2') format('woff2'),
+    url("woff2/FiraCode-Bold.woff") format("woff");
   font-weight: 700;
   font-style: normal;
 }
 
 @font-face {
   font-family: 'Fira Code VF';
-  src: url('woff2/FiraCode-VF.woff2') format('woff2-variations');
+  src: url('woff2/FiraCode-VF.woff2') format('woff2-variations'),
+       url('woff/FiraCode-VF.woff') format('woff-variations');
+  /* font-weight requires a range: https://developer.mozilla.org/en-US/docs/Web/CSS/CSS_Fonts/Variable_Fonts_Guide#Using_a_variable_font_font-face_changes */
+  font-weight: 300 700;
+  font-style: normal;
 }
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