diff --git a/.goreleaser.yml b/.goreleaser.yml
index 38bd9405..f6ba836d 100644
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@@ -82,7 +82,12 @@ brews:
     email: k1lowxb@gmail.com
   homepage: https://github.com/k1LoW/tbls
   description: 'tbls is a CI-Friendly tool for document a database, written in Go.'
-  install: bin.install 'tbls'
+  install: |
+    system './tbls', 'completion', 'bash', '--out', 'tbls.bash'
+    system './tbls', 'completion', 'zsh', '--out', 'tbls.zsh'
+    bin.install 'tbls'
+    bash_completion.install 'tbls.bash' => 'tbls'
+    zsh_completion.install 'tbls.zsh' => '_tbls'
 nfpms:
   -
     id: tbls-nfpms
diff --git a/cmd/completion.go b/cmd/completion.go
new file mode 100644
index 00000000..e8768103
--- /dev/null
+++ b/cmd/completion.go
@@ -0,0 +1,91 @@
+/*
+Copyright © 2020 Ken'ichiro Oyama <k1lowxb@gmail.com>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+*/
+package cmd
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/spf13/cobra"
+)
+
+var out string
+
+// completionCmd represents the completion command
+var completionCmd = &cobra.Command{
+	Use:   "completion",
+	Short: "output shell completion code",
+	Long: `output shell completion code.
+To configure your shell to load completions for each session
+
+# bash
+echo '. <(tbls completion bash)' > ~/.bashrc
+
+# zsh
+tbls completion zsh > $fpath[1]/_tbls
+`,
+	ValidArgs: []string{"bash", "zsh"},
+	Args: func(cmd *cobra.Command, args []string) error {
+		if len(args) != 1 {
+			return fmt.Errorf("accepts 1 arg, received %d", len(args))
+		}
+		if err := cobra.OnlyValidArgs(cmd, args); err != nil {
+			return err
+		}
+		return nil
+	},
+	Run: func(cmd *cobra.Command, args []string) {
+		var (
+			o   *os.File
+			err error
+		)
+		sh := args[0]
+		if out == "" {
+			o = os.Stdout
+		} else {
+			o, err = os.Create(out)
+			if err != nil {
+				_, _ = fmt.Fprintf(os.Stderr, "%s\n", err)
+				os.Exit(1)
+			}
+			defer o.Close()
+		}
+
+		switch sh {
+		case "bash":
+			if err := rootCmd.GenBashCompletion(o); err != nil {
+				_, _ = fmt.Fprintf(os.Stderr, "%s\n", err)
+				os.Exit(1)
+			}
+		case "zsh":
+			if err := rootCmd.GenZshCompletion(o); err != nil {
+				_, _ = fmt.Fprintf(os.Stderr, "%s\n", err)
+				os.Exit(1)
+			}
+		}
+	},
+}
+
+func init() {
+	rootCmd.AddCommand(completionCmd)
+	completionCmd.Flags().StringVarP(&out, "out", "o", "", "output file path")
+}