diff --git a/cmd/activate_commit_validator.go b/cmd/activate_commit_validator.go
new file mode 100644
index 0000000..ad7d3b4
--- /dev/null
+++ b/cmd/activate_commit_validator.go
@@ -0,0 +1,32 @@
+// Copyright 2022 Paulus Gandung Prakosa <gandung@lists.infradead.org>
+// All rights reserved.
+
+package cmd
+
+import (
+	"github.com/plvhx/polar/src"
+	"github.com/spf13/cobra"
+)
+
+var (
+	hookName    = "prepare-commit-msg"
+	hookCommand = "polar validate-commit"
+)
+
+var activateFunc = func(cmd *cobra.Command, args []string) {
+	if err := src.CreateHook(hookName, hookCommand); err != nil {
+		panic(err)
+	}
+}
+
+var activateCmd = &cobra.Command{
+	Use:     "activate-commit-validator",
+	Short:   "Activate prepare-commit-msg hook",
+	Long:    "Activate prepare-commit-msg hook for validating commit message.",
+	Example: "polar activate-commit-validator",
+	Run:     activateFunc,
+}
+
+func init() {
+	rootCmd.AddCommand(activateCmd)
+}