diff --git a/network/web/firefox/pspec.xml b/network/web/firefox/pspec.xml
index b351ffbaa6..338f4aa6df 100644
--- a/network/web/firefox/pspec.xml
+++ b/network/web/firefox/pspec.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE PISI SYSTEM "http://www.pisilinux.org/projeler/pisi/pisi-spec.dtd">
+<!DOCTYPE PISI SYSTEM "https://pisilinux.org/projeler/pisi/pisi-spec.dtd">
 <PISI>
     <Source>
         <Name>firefox</Name>