diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f5afff8f5..361c1ad16 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -96,7 +96,7 @@ env:
     ruby
     rubygem-asciidoctor
     sudo
-    tcl87
+    tcl86
     zstd
 
 jobs: