diff --git a/cmdeploy/pyproject.toml b/cmdeploy/pyproject.toml
index f8afa1f3..2a33052d 100644
--- a/cmdeploy/pyproject.toml
+++ b/cmdeploy/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "setuptools.build_meta"
 name = "cmdeploy"
 version = "0.2"
 dependencies = [
-  "pyinfra",
+  "pyinfra>=3",
   "pillow",
   "qrcode",
   "markdown",
diff --git a/cmdeploy/src/cmdeploy/cmdeploy.py b/cmdeploy/src/cmdeploy/cmdeploy.py
index 3b9def7e..1fe4fb48 100644
--- a/cmdeploy/src/cmdeploy/cmdeploy.py
+++ b/cmdeploy/src/cmdeploy/cmdeploy.py
@@ -68,8 +68,9 @@ def run_cmd(args, out):
     deploy_path = importlib.resources.files(__package__).joinpath("deploy.py").resolve()
     pyinf = "pyinfra --dry" if args.dry_run else "pyinfra"
     cmd = f"{pyinf} --ssh-user root {args.config.mail_domain} {deploy_path}"
-    if version.parse(pyinfra.__version__) >= version.parse("3"):
-        cmd += " -y"
+    if version.parse(pyinfra.__version__) < version.parse("3"):
+        out.red("Please re-run scripts/initenv.sh to update pyinfra to version 3.")
+        return 1
 
     retcode = out.check_call(cmd, env=env)
     if retcode == 0: