diff --git a/libnspr.spec b/libnspr.spec
index 6cb5270..26b4b52 100644
--- a/libnspr.spec
+++ b/libnspr.spec
@@ -1,5 +1,5 @@
 Name:          libnspr
-Version:       4.30
+Version:       4.31
 Release:       1mamba
 Summary:       Netscape Portable Runtime
 Summary(it):   Runtime portabili di Netscape
@@ -7,7 +7,7 @@ Group:         System/Libraries
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           https://www.mozilla.org/projects/nspr/
+URL:           https://developer.mozilla.org/en-US/docs/Mozilla/Projects/NSPR
 Source0:       https://ftp.mozilla.org/pub/nspr/releases/v%{version}/src/nspr-%{version}.tar.gz
 Source1:       nspr.pc.in
 Source2:       nspr-config-vars.in
@@ -120,6 +120,9 @@ rm -f %{buildroot}%{_libdir}/libplds4.a
 %{_libdir}/pkgconfig/nspr.pc
 
 %changelog
+* Thu May 27 2021 Automatic Build System <autodist@mambasoft.it> 4.31-1mamba
+- automatic version update by autodist
+
 * Wed Mar 17 2021 Automatic Build System <autodist@mambasoft.it> 4.30-1mamba
 - automatic version update by autodist