diff --git a/src/index.js b/src/index.js
index c7df0c613c67cb2c8c5e7922264dda916cf64e98..bce2c7b130db3b9395b72070fe08767b51276cd4 100644
--- a/src/index.js
+++ b/src/index.js
@@ -68,6 +68,10 @@ function getTranslation() {
   return locales[locale];
 }
 
+if (!fs.existsSync(path.join(process.cwd(), 'package.json'))) {
+  logger.error('package.json does not exist');
+  process.exit(1);
+}
 const PKG = JSON.parse(fs.readFileSync(path.join(process.cwd(), 'package.json')));
 const INITIAL_VERSION = '1.0.0';
 const TAG_PREFIX = 'v';
@@ -100,7 +104,7 @@ async function fetchLatestVersion(info) {
     });
   });
   if (release.tag_name && release.tag_name.charAt(0) === 'v') {
-    const version = release.tag_name.substr(1);
+    const version = release.tag_name.slice(1);
     logger.log(`Latest version: ${version}`);
     return [version, release.target_commitish];
   }
@@ -173,8 +177,8 @@ function getGitRepoInfo() {
 
   function parseUrl(url) {
     [info.owner, info.repo] = url.split(':')[1].split('/');
-    if (info.repo.substr(info.repo.length - 4) === '.git') {
-      info.repo = info.repo.substr(0, info.repo.length - 4);
+    if (info.repo.endsWith('.git')) {
+      info.repo = info.repo.slice(0, -4);
     }
   }
 
@@ -220,11 +224,11 @@ async function collect(latestVersion) {
         return false;
       }
 
-      let message = line.substr(1);
+      let message = line.slice(1);
       const i = message.indexOf('(');
 
       if (i > 0) {
-        message = message.substr(0, i).trim();
+        message = message.substring(0, i).trim();
       }
       // 忽略重复的提交信息
       if (messages.has(message)) {