diff --git a/link-grammar.spec b/link-grammar.spec
index 0d02dee..574daf3 100644
--- a/link-grammar.spec
+++ b/link-grammar.spec
@@ -1,13 +1,13 @@
 Name:          link-grammar
-Version:       5.12.3
+Version:       5.12.4
 Release:       1mamba
 Summary:       A syntactic parser of English, Russian, Arabic and Persian (and other languages as well)
 Group:         Applications/Publishing
 Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
-URL:           http://www.abisource.com/projects/link-grammar/
-Source:        http://www.abisource.com/downloads/link-grammar/%{version}/link-grammar-%{version}.tar.gz
+URL:           https://opencog.github.io/link-grammar-website/
+Source:        https://www.gnucash.org/link-grammar/downloads/%{version}/link-grammar-%{version}.tar.gz
 License:       BSD
 ## AUTOBUILDREQ-BEGIN
 BuildRequires: glibc-devel
@@ -16,6 +16,7 @@ BuildRequires: libgcc
 BuildRequires: libhunspell-devel
 BuildRequires: libpcre2-devel
 BuildRequires: libpython3-devel
+BuildRequires: libpython311-devel
 BuildRequires: libsqlite-devel
 BuildRequires: libstdc++6-devel
 ## AUTOBUILDREQ-END
@@ -149,6 +150,9 @@ This package contains libraries and header files for developing applications tha
 #%doc ChangeLog README TODO
 
 %changelog
+* Mon Apr 29 2024 Silvan Calarco <silvan.calarco@mambasoft.it> 5.12.4-1mamba
+- update to 5.12.4
+
 * Sat Mar 25 2023 Automatic Build System <autodist@mambasoft.it> 5.12.3-1mamba
 - automatic version update by autodist