diff --git a/.gitignore b/.gitignore
index 41b6bd6..fbf22be 100644
--- a/.gitignore
+++ b/.gitignore
@@ -16,3 +16,4 @@
 gup
 dist
 cover.*
+/completions
diff --git a/.goreleaser.yml b/.goreleaser.yml
index 678e208..12cf7da 100644
--- a/.goreleaser.yml
+++ b/.goreleaser.yml
@@ -5,6 +5,7 @@ before:
   hooks:
     - go mod tidy
     - go generate ./...
+    - ./scripts/completions.sh
 builds:
   - main: .
     ldflags:
@@ -20,6 +21,8 @@ archives:
     format_overrides:
       - goos: windows
         format: zip
+    files:
+    - completions/*
 checksum:
   name_template: "checksums.txt"
 snapshot:
@@ -31,7 +34,7 @@ changelog:
       - "^docs:"
       - "^test:"
 nfpms:
-  - maintainer: Naohiro CHIKAMATSU <n.chika156@gmail.com>
+  - maintainer: 'Naohiro CHIKAMATSU <n.chika156@gmail.com>'
     description: gup - Update binaries installed by 'go install'
     homepage: https://github.com/nao1215/gup
     license: Apache License 2.0
@@ -39,6 +42,19 @@ nfpms:
       - deb
       - rpm
       - apk
+    contents:
+      - src: ./completions/gup.bash
+        dst: /usr/share/bash-completion/completions/gup
+        file_info:
+          mode: 0644
+      - src: ./completions/gup.fish
+        dst: /usr/share/fish/vendor_completions.d/gup.fish
+        file_info:
+          mode: 0644
+      - src: ./completions/gup.zsh
+        dst: /usr/share/zsh/vendor-completions/_gup
+        file_info:
+          mode: 0644
 brews:
   - name: gup
     description: gup - Update binaries installed by 'go install'
@@ -47,3 +63,9 @@ brews:
       owner: nao1215
       name: homebrew-tap
       token: "{{ .Env.TAP_GITHUB_TOKEN }}"
+    # Ref. https://carlosbecker.com/posts/golang-completions-cobra/
+    install: |-
+      bin.install "gup"
+      bash_completion.install "completions/gup.bash" => "gup"
+      zsh_completion.install "completions/gup.zsh" => "gup"
+      fish_completion.install "completions/gup.fish"    
diff --git a/scripts/completions.sh b/scripts/completions.sh
new file mode 100755
index 0000000..5747cca
--- /dev/null
+++ b/scripts/completions.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+# scripts/completions.sh
+set -eux
+
+rm -rf completions
+mkdir completions
+
+for sh in bash zsh fish; do
+    go run main.go completion "$sh" >"completions/gup.$sh"
+done