diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9a84eb5..ef121d1 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -20,4 +20,5 @@ jobs:
       - uses: actions/checkout@v4
       - uses: tsuyoshicho/action-textlint@v3
         with:
+          package_manager: yarn
           fail_on_error: true
diff --git a/.gitignore b/.gitignore
index 27c6bf9..4897da7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,6 @@
+/.yarn
+/.pnp*
+
 /*.pdf
 /*.epub
 /*.html
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..cb9b9cf
--- /dev/null
+++ b/package.json
@@ -0,0 +1,3 @@
+{
+  "packageManager": "yarn@4.3.1"
+}
diff --git a/yarn.lock b/yarn.lock
new file mode 100644
index 0000000..11cbfd1
--- /dev/null
+++ b/yarn.lock
@@ -0,0 +1,12 @@
+# This file is generated by running "yarn install" inside your project.
+# Manual changes might be lost - proceed with caution!
+
+__metadata:
+  version: 8
+  cacheKey: 10c0
+
+"root-workspace-0b6124@workspace:.":
+  version: 0.0.0-use.local
+  resolution: "root-workspace-0b6124@workspace:."
+  languageName: unknown
+  linkType: soft