diff --git a/desktop/xfce/lookandfeel/icon-theme-xfce4/pspec.xml b/desktop/xfce/lookandfeel/icon-theme-xfce4/pspec.xml
index 6e1f85c610..1f6ee5245c 100644
--- a/desktop/xfce/lookandfeel/icon-theme-xfce4/pspec.xml
+++ b/desktop/xfce/lookandfeel/icon-theme-xfce4/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://www.pisilinux.org/projeler/pisi/pisi-spec.dtd">
 <PISI>
     <Source>
         <Name>icon-theme-xfce4</Name>