diff --git a/.github/scripts/security-checker.mjs b/.github/scripts/security-checker.mjs
new file mode 100644
index 0000000..841c82e
--- /dev/null
+++ b/.github/scripts/security-checker.mjs
@@ -0,0 +1,177 @@
+const STATES = {
+  open:   'open',
+  closed: 'closed',
+};
+
+const LABELS = {
+  dependabot: 'dependabot',
+  codeq:      'codeql',
+  security:   'security notification',
+};
+
+class SecurityChecker {
+  constructor (github, context, issueRepo) {
+      this.github    = github;
+      this.issueRepo = issueRepo;
+      this.context   = {
+          owner: context.repo.owner,
+          repo:  context.repo.repo,
+      };
+  }
+
+  async check () {
+      const dependabotAlerts = await this.getDependabotAlerts();
+      const codeqlAlerts     = await this.getCodeqlAlerts();
+      const existedIssues    = await this.getExistedIssues();
+
+      this.alertDictionary = this.createAlertDictionary(existedIssues);
+
+      await this.closeSpoiledIssues();
+      this.createDependabotlIssues(dependabotAlerts);
+      this.createCodeqlIssues(codeqlAlerts);
+  }
+
+  async getDependabotAlerts () {
+      const { data } = await this.github.rest.dependabot.listAlertsForRepo({ state: STATES.open, ...this.context });
+
+      return data;
+  }
+
+  async getCodeqlAlerts () {
+      try {
+          const { data } = await this.github.rest.codeScanning.listAlertsForRepo({ state: STATES.open, ...this.context });
+
+          return data;
+      }
+      catch (e) {
+          if (e.message.includes('no analysis found'))
+              return [];
+
+          throw e;
+      }
+  }
+
+  async getExistedIssues () {
+      const { data: existedIssues } = await this.github.rest.issues.listForRepo({
+          owner:  this.context.owner,
+          repo:   this.issueRepo,
+          labels: [LABELS.security],
+          state:  STATES.open,
+      });
+
+      return existedIssues;
+  }
+
+  createAlertDictionary (existedIssues) {
+      return existedIssues.reduce((res, issue) => {
+          const [, url, number] = issue.body.match(/Link:\s*(https.*?(\d+)$)/);
+
+          if (!url)
+              return res;
+
+          res[url] = {
+              issue, number,
+              isDependabot: url.includes('dependabot'),
+          };
+
+          return res;
+      }, {});
+  }
+
+  async closeSpoiledIssues () {
+      for (const key in this.alertDictionary) {
+          const alert = this.alertDictionary[key];
+
+          if (alert.isDependabot) {
+              const isAlertOpened = await this.isDependabotAlertOpened(alert.number);
+
+              if (isAlertOpened)
+                  continue;
+
+              await this.closeIssue(alert.issue.number);
+          }
+      }
+  }
+
+  async isDependabotAlertOpened (alertNumber) {
+      const alert = await this.getDependabotAlertInfo(alertNumber);
+
+      return alert.state === STATES.open;
+  }
+
+  async getDependabotAlertInfo (alertNumber) {
+      try {
+          const { data } = await this.github.rest.dependabot.getAlert({ alert_number: alertNumber, ...this.context });
+
+          return data;
+      }
+      catch (e) {
+          if (e.message.includes('No alert found for alert number'))
+              return {};
+
+          throw e;
+      }
+  }
+
+  async closeIssue (issueNumber) {
+      return this.github.rest.issues.update({
+          owner:        this.context.owner,
+          repo:         this.issueRepo,
+          issue_number: issueNumber,
+          state:        STATES.closed,
+      });
+  }
+
+  async createDependabotlIssues (dependabotAlerts) {
+      dependabotAlerts.forEach(alert => {
+          if (!this.needCreateIssue(alert))
+              return;
+
+          this.createIssue({
+              labels:       [LABELS.dependabot, LABELS.security, alert.dependency.scope],
+              originRepo:   this.context.repo,
+              summary:      alert.security_advisory.summary,
+              description:  alert.security_advisory.description,
+              link:         alert.html_url,
+              issuePackage: alert.dependency.package.name,
+          });
+      });
+  }
+
+  async createCodeqlIssues (codeqlAlerts) {
+      codeqlAlerts.forEach(alert => {
+          if (!this.needCreateIssue(alert))
+              return;
+
+          this.createIssue({
+              labels:      [LABELS.codeql, LABELS.security],
+              originRepo:  this.context.repo,
+              summary:     alert.rule.description,
+              description: alert.most_recent_instance.message.text,
+              link:        alert.html_url,
+          });
+      });
+  }
+
+  needCreateIssue (alert) {
+      return !this.alertDictionary[alert.html_url];
+  }
+
+  async createIssue ({ labels, originRepo, summary, description, link, issuePackage = '' }) {
+      const title = `[${originRepo}] ${summary}`;
+      const body = ''
+                    + `#### Repository: \`${originRepo}\`\n`
+                    + (issuePackage ? `#### Package: \`${issuePackage}\`\n` : '')
+                    + `#### Description:\n`
+                    + `${description}\n`
+                    + `#### Link: ${link}`;
+
+      return this.github.rest.issues.create({
+          title, body, labels,
+          owner: this.context.owner,
+          repo:  this.issueRepo,
+      });
+  }
+}
+
+export default SecurityChecker;