diff --git a/dist/index.js b/dist/index.js
index 8c2ceda..3a5d1da 100644
--- a/dist/index.js
+++ b/dist/index.js
@@ -70776,7 +70776,7 @@ var createPullRequest = (options) => __async(void 0, null, function* () {
   const repo = `${github.context.repo.owner}/${github.context.repo.repo}`;
   const branch = github.context.ref.replace("refs/heads/", "");
   const octokit = github.getOctokit(githubToken);
-  const searchQuery = `repo:${repo}+state:open+head:${baseBranch}+base:${branch}`;
+  const searchQuery = `repo:${repo}+state:open+head:${baseBranch}+base:${branch}+is:pull-request`;
   const searchResult = yield octokit.rest.search.issuesAndPullRequests({
     q: searchQuery
   });
diff --git a/package.json b/package.json
index 6da654c..b80f292 100644
--- a/package.json
+++ b/package.json
@@ -69,5 +69,6 @@
   "publishConfig": {
     "access": "public",
     "registry": "https://registry.npmjs.org/"
-  }
+  },
+  "packageManager": "pnpm@8.15.9"
 }
diff --git a/src/utils/github.ts b/src/utils/github.ts
index 866a3de..b65bda9 100644
--- a/src/utils/github.ts
+++ b/src/utils/github.ts
@@ -23,7 +23,8 @@ export const createPullRequest = async (options: CreatePullRequestOptions) => {
   const octokit = github.getOctokit(githubToken);
 
   // 判断当前 Pull Request 是否存在
-  const searchQuery = `repo:${repo}+state:open+head:${baseBranch}+base:${branch}`;
+  // https://docs.github.com/en/rest/search/search?apiVersion=2022-11-28#search-issues-and-pull-requests
+  const searchQuery = `repo:${repo}+state:open+head:${baseBranch}+base:${branch}+is:pull-request`;
   const searchResult = await octokit.rest.search.issuesAndPullRequests({
     q: searchQuery,
   });