diff --git a/blt.spec b/blt.spec
index 9773bb4..1134d7b 100644
--- a/blt.spec
+++ b/blt.spec
@@ -1,7 +1,7 @@
 Summary: BLT widget extension to Tcl/Tk scripting language development
 Name: blt
 Version: 2.4
-Release: 14.z%{?dist}
+Release: 15.z%{?dist}
 
 License: MIT
 Group: Development/Libraries
@@ -9,8 +9,8 @@ Source: http://download.sourceforge.net/blt/BLT2.4z.tar.gz
 Patch0: http://download.sourceforge.net/blt/blt2.4z-patch-2
 Patch1: http://jfontain.free.fr/blt2.4z-patch-64
 URL: http://sourceforge.net/projects/blt/
-BuildRequires: tk-devel >= 8.4.7
-Requires: tk >= 8.4.7
+BuildRequires: tk-devel >= 8.4.7, tk-devel < 8.5
+Requires: tk >= 8.4.7, tk < 8.5
 BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%__id_u -n)
 
 %description
@@ -52,6 +52,9 @@ rm -rf $RPM_BUILD_ROOT
 
 %changelog
 
+* Thu Feb 8 2007 Jean-Luc Fontaine <jfontain@free.fr> 2.4-15.z
+- require tk < 8.5
+
 * Mon Aug 28 2006 Jean-Luc Fontaine <jfontain@free.fr> 2.4-14.z
 - added dist tag
 - rebuild for Fedora Extras 6