diff --git a/python3.13.spec b/python3.13.spec
index deaa1f4..dbd82c5 100644
--- a/python3.13.spec
+++ b/python3.13.spec
@@ -265,8 +265,8 @@ BuildRequires: readline-devel
 BuildRequires: redhat-rpm-config >= 127
 BuildRequires: sqlite-devel
 BuildRequires: systemtap-sdt-devel
-BuildRequires: tcl-devel
-BuildRequires: tk-devel
+BuildRequires: tcl-devel < 1:9
+BuildRequires: tk-devel < 1:9
 BuildRequires: xz-devel
 BuildRequires: zlib-devel
 BuildRequires: /usr/bin/dtrace