diff --git a/stacks/pinot-noir/definitions_stack.yaml b/stacks/pinot-noir/definitions_stack.yaml
index 4456ae2ff2c21ae761ea594cd693a5ce9aa9b471..33d5a57dd85680a53b358ed99931f42d3308c417 100644
--- a/stacks/pinot-noir/definitions_stack.yaml
+++ b/stacks/pinot-noir/definitions_stack.yaml
@@ -39,7 +39,7 @@ definitions:
       - tar
       - tcl
       - tk
-      - tmux
+      - tmux@3.4
       - trimmomatic
       - xclip
       - zlib-ng