diff --git a/licenses.go b/licenses.go
new file mode 100644
index 0000000..e5474cc
--- /dev/null
+++ b/licenses.go
@@ -0,0 +1,26 @@
+package main
+
+import (
+	"embed"
+	"os"
+
+	"github.com/mjl-/mox/mox-"
+)
+
+//go:embed LICENSE.MIT LICENSE.MPLv2.0 licenses/*
+var licensesFsys embed.FS
+
+func init() {
+	mox.LicensesFsys = licensesFsys
+}
+
+func cmdLicenses(c *cmd) {
+	c.help = `Print licenses of mox source code and dependencies.`
+	args := c.Parse()
+	if len(args) != 0 {
+		c.Usage()
+	}
+
+	err := mox.LicensesWrite(os.Stdout)
+	xcheckf(err, "write")
+}