diff --git a/tcl.yaml b/tcl.yaml
index 11113af..af2f65b 100644
--- a/tcl.yaml
+++ b/tcl.yaml
@@ -1,4 +1,4 @@
 version_control: github
 src_repo: tcltk/tcl
 tag_prefix: ^core-
-seperator: -
+seperator: "-"