diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 92a4ada9..97af3b4f 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -28,7 +28,7 @@ jobs:
           # Note: Specifying the version of valgrind is not supported.
           # cargo-watch is supported by cargo-binstall (through quickinstall)
           - cargo-hack,cargo-llvm-cov,cargo-minimal-versions,parse-changelog,cargo-udeps,cargo-valgrind,cross,nextest,protoc,shellcheck,shfmt,valgrind,wasm-pack,wasmtime,mdbook,mdbook-linkcheck,cargo-watch
-          - cargo-hack@0.5.20,cargo-llvm-cov@0.5.0,cargo-minimal-versions@0.1.5,parse-changelog@0.5.1,cargo-udeps@0.1.33,cargo-valgrind@2.1.0,cross@0.2.4,nextest@0.9.11,protoc@3.21.6,shellcheck@0.8.0,shfmt@3.5.1,wasm-pack@0.10.3,wasmtime@1.0.0,mdbook@0.4.21,mdbook-linkcheck@0.7.6,cargo-watch@8.1.1
+          - cargo-hack@0.5.21,cargo-llvm-cov@0.5.0,cargo-minimal-versions@0.1.5,parse-changelog@0.5.1,cargo-udeps@0.1.33,cargo-valgrind@2.1.0,cross@0.2.4,nextest@0.9.11,protoc@3.21.6,shellcheck@0.8.0,shfmt@3.5.1,wasm-pack@0.10.3,wasmtime@1.0.0,mdbook@0.4.21,mdbook-linkcheck@0.7.6,cargo-watch@8.1.1
           # Nextest supports basic version ranges as well
           - nextest@0.9
         include:
diff --git a/CHANGELOG.md b/CHANGELOG.md
index de170b2d..bd79f504 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -10,6 +10,8 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+- Update `cargo-hack@latest` to 0.5.21.
+
 ## [1.13.7] - 2022-09-25
 
 - Work around cargo-binstall upgrade issue on Windows. ([#23](https://github.com/taiki-e/install-action/pull/23))
diff --git a/README.md b/README.md
index eb69adf0..31aaa91b 100644
--- a/README.md
+++ b/README.md
@@ -39,7 +39,7 @@ To install a specific version, use `@version` syntax:
 ```yaml
 - uses: taiki-e/install-action@v1
   with:
-    tool: cargo-hack@0.5.20
+    tool: cargo-hack@0.5.21
 ```
 
 To install multiple tools:
diff --git a/main.sh b/main.sh
index f9f59a02..87b9cf59 100755
--- a/main.sh
+++ b/main.sh
@@ -174,7 +174,7 @@ for tool in "${tools[@]}"; do
         cargo-hack | cargo-llvm-cov | cargo-minimal-versions | parse-changelog)
             case "${tool}" in
                 # https://github.com/taiki-e/cargo-hack/releases
-                cargo-hack) latest_version="0.5.20" ;;
+                cargo-hack) latest_version="0.5.21" ;;
                 # https://github.com/taiki-e/cargo-llvm-cov/releases
                 cargo-llvm-cov) latest_version="0.5.0" ;;
                 # https://github.com/taiki-e/cargo-minimal-versions/releases