diff --git a/_docker-enter-completion.zsh b/_docker-enter-completion.zsh
index f5ec57f..636f124 100644
--- a/_docker-enter-completion.zsh
+++ b/_docker-enter-completion.zsh
@@ -2,11 +2,10 @@
 
 _docker-enter() {
 	local state
-	_arguments -C '1: :->container' '2: :->shell'
+	_arguments -C '1: :->container'
 
 	case $state in
 		(container) compadd -- $(docker ps --format '{{.Names}}');;
-		(shell) compadd -P /bin/ -- bash sh;;
 	esac
 }
 
diff --git a/docker-enter.plugin.zsh b/docker-enter.plugin.zsh
index 31e0d5f..5c9f4d0 100644
--- a/docker-enter.plugin.zsh
+++ b/docker-enter.plugin.zsh
@@ -5,6 +5,6 @@
 ## for civil use only
 
 docker-enter() {
-	docker exec -it $1 ${2:-"/bin/bash"}
+	docker exec -it $1 /bin/sh
 }