diff --git a/dogfood/coder/main.tf b/dogfood/coder/main.tf
index ac1cf25501..bf71c09ed7 100644
--- a/dogfood/coder/main.tf
+++ b/dogfood/coder/main.tf
@@ -375,7 +375,7 @@ module "personalize" {
 module "mux" {
   count           = data.coder_workspace.me.start_count
   source          = "registry.coder.com/coder/mux/coder"
-  version         = "1.3.1"
+  version         = "1.4.0"
   agent_id        = coder_agent.dev.id
   subdomain       = true
   display_name    = "Mux"