diff --git a/.gitignore b/.gitignore
index ad4bd09..89eb01f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 /giac-1.2.2.103.tar.gz
 /giac-1.2.2.105.tar.gz
 /giac-1.2.3.9.tar.gz
+/giac-1.2.3.13.tar.gz
diff --git a/giac-makesrc.sh b/giac-makesrc.sh
index be30546..55504e0 100755
--- a/giac-makesrc.sh
+++ b/giac-makesrc.sh
@@ -5,7 +5,7 @@
 #
 
 VERSION="1.2.3"
-VERSIONREV="9"
+VERSIONREV="13"
 
 # The upstream tarball name is: giac"$SOURCEORIG".tar.gz
 SOURCEORIG=_"$VERSION"-"$VERSIONREV"
diff --git a/giac.spec b/giac.spec
index 4b25bc7..f846344 100644
--- a/giac.spec
+++ b/giac.spec
@@ -6,12 +6,12 @@ ExcludeArch: aarch64 %{power64} s390x
 # See http://pcm1.e.ujf-grenoble.fr/forum/viewtopic.php?f=19&t=1733&sid=3257f5085f4ae208dc36665f2873252f
 %bcond_with check
 
-%global subversion 9
+%global subversion 13
 
 Name:          giac
 Summary:       Computer Algebra System, Symbolic calculus, Geometry
 Version:       1.2.3
-Release:       2.%{subversion}%{?dist}
+Release:       1.%{subversion}%{?dist}
 # LGPLv3+: src/Fl_GDI_Printer.cxx, src/Flv_List.cc, src/Flv_Table.cc
 # BSD: src/tinymt32*
 License:       GPLv3+
@@ -404,6 +404,9 @@ make -C check check
 %{_datadir}/giac/examples/
 
 %changelog
+* Wed Jan 18 2017 Antonio Trande <sagitterATfedoraproject.org> 1.2.3-1.13
+- Update to 1.2.3 sub-13
+
 * Thu Jan 12 2017 Igor Gnatenko <ignatenko@redhat.com> - 1.2.3-2.9
 - Rebuild for readline 7.x
 
diff --git a/sources b/sources
index 1bd2fcb..d2a6d9d 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (giac-1.2.3.9.tar.gz) = 584a7cf243aa9f90591c8f309a209fbbb7a45173e4a415044daffefeb3e17098d35373175d21c7367552ca8b4c3ec49149999df49480a5f7d40dc486965a5303
+SHA512 (giac-1.2.3.13.tar.gz) = b905294453f8d42dc7195365fe661f8d851b3af04506b23f371691957f0db2567c0644862be77382ae936124208d189816773f1e6cee2354efe9cd1e4c9f80d7