diff --git a/python3.6.spec b/python3.6.spec
index 6b485f4..74c21a3 100644
--- a/python3.6.spec
+++ b/python3.6.spec
@@ -279,9 +279,9 @@ BuildRequires: gdb
 BuildRequires: openssl-devel
 
 BuildRequires: tar
-BuildRequires: tcl-devel
+BuildRequires: tcl-devel < 1:9
 BuildRequires: tix-devel
-BuildRequires: tk-devel
+BuildRequires: tk-devel < 1:9
 
 %if %{with valgrind}
 BuildRequires: valgrind-devel