diff --git a/science/mathematics/libqalculate/pspec.xml b/science/mathematics/libqalculate/pspec.xml
index 7a8aa2a234..aae857505a 100644
--- a/science/mathematics/libqalculate/pspec.xml
+++ b/science/mathematics/libqalculate/pspec.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" ?>
-<!DOCTYPE PISI SYSTEM "https://www.pisilinux.org/projeler/pisi/pisi-spec.dtd">
+<!DOCTYPE PISI SYSTEM "https://pisilinux.org/projeler/pisi/pisi-spec.dtd">
 <PISI>
     <Source>
         <Name>libqalculate</Name>
@@ -121,4 +121,4 @@
             <Email>admins@pisilinux.org</Email>
         </Update>
     </History>
-</PISI>
\ No newline at end of file
+</PISI>