diff --git a/gimp.spec b/gimp.spec
index 5cf4852..1719189 100644
--- a/gimp.spec
+++ b/gimp.spec
@@ -12,7 +12,7 @@
 Name:          gimp
 Epoch:         1
 Version:       2.10.22
-Release:       2mamba
+Release:       3mamba
 Summary:       The GNU Image Manipulation Program
 Group:         Graphical Desktop/Applications/Graphics
 Vendor:        openmamba
@@ -102,6 +102,7 @@ Requires:      python-gimp = %{?epoch:%epoch:}%{version}-%{release}
 Requires:      libtiff >= 3.5.7
 Requires:      dbus-tools
 Requires:      iso-codes
+Requires:      graphviz
 BuildRoot:     %{_tmppath}/%{name}-%{version}-root
 #====================================================
 # warning FIXME: "reverse" hardcoded to FALSE.
@@ -309,6 +310,9 @@ done
 %endif
 
 %changelog
+* Tue Feb 09 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 2.10.22-3mamba
+- require graphviz
+
 * Fri Jan 01 2021 Silvan Calarco <silvan.calarco@mambasoft.it> 2.10.22-2mamba
 - python-gimp: removed requirements for python 2.6