diff --git a/lyx.spec b/lyx.spec
index ed91e04..cab572d 100644
--- a/lyx.spec
+++ b/lyx.spec
@@ -1,7 +1,8 @@
 %define majver %(echo %version | cut -d. -f1-2)
-%define srcver %(echo %version | cut -d. -f1-3)-%(echo %version | cut -d. -f4)
+%define srcver %(echo %version | tr _ -)
+%define maj123ver %(echo %version | cut -d_ -f1)
 Name:          lyx
-Version:       2.3.6.1
+Version:       2.3.7_1
 Release:       1mamba
 Summary:       WYSIWYM (What You See Is What You Mean) document processor
 Group:         Applications/Publishing
@@ -9,7 +10,7 @@ Vendor:        openmamba
 Distribution:  openmamba
 Packager:      Silvan Calarco <silvan.calarco@mambasoft.it>
 URL:           https://www.lyx.org/
-Source:        https://ftp.lip6.fr/pub/lyx/stable/%{majver}.x/lyx-%{version}.tar.xz
+Source:        https://ftp.lip6.fr/pub/lyx/stable/%{majver}.x/lyx-%{srcver}.tar.gz
 Source1:       lyx-desktop
 Patch0:        %{name}-2.0.0-hunspell-1.3.patch
 License:       GPL
@@ -73,7 +74,7 @@ Despite its simple GUI interface (available in many languages), it supports tabl
 %debug_package
 
 %prep
-%setup -q
+%setup -q -n %{name}-%{maj123ver}
 #%patch0 -p1
 #./autogen.sh
 
@@ -116,6 +117,9 @@ install -D -m644 %{S:1} \
 #NEWS README
 
 %changelog
+* Fri Sep 22 2023 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.7_1-1mamba
+- update to 2.3.7_1
+
 * Wed May 19 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 2.3.6.1-1mamba
 - update to 2.3.6.1