diff --git a/fonts/10-liberation.conf b/fonts/10-liberation.conf
index 326f2df6..528eb12e 100644
--- a/fonts/10-liberation.conf
+++ b/fonts/10-liberation.conf
@@ -1,19 +1,19 @@
 <?xml version="1.0"?>
 <!DOCTYPE fontconfig SYSTEM "fonts.dtd">
 <fontconfig>
-  <alias>
+  <alias binding="strong">
     <family>sans-serif</family>
     <prefer>
       <family>Liberation Sans</family>
     </prefer>
   </alias>
-  <alias>
+  <alias binding="strong">
     <family>serif</family>
     <prefer>
       <family>Liberation Serif</family>
     </prefer>
   </alias>
-  <alias>
+  <alias binding="strong">
     <family>monospace</family>
     <prefer>
       <family>Liberation Mono</family>