diff --git a/science/mathematics/rkward/pspec.xml b/science/mathematics/rkward/pspec.xml
index cb2b248fb2..516e3ea98f 100755
--- a/science/mathematics/rkward/pspec.xml
+++ b/science/mathematics/rkward/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>rkward</Name>