diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 241e548..4b2d04a 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,5 +21,5 @@ jobs:
         SLACK_USERNAME: 'Capicapi'
         SLACK_GITHUB_USER_PAIRS: ${{ secrets.SLACK_USER }}
         TITLE: ':tada: Success :tada:'
-        BODY: 'ry-itto ry-itto ry-itto'
+        BODY: 'ry-itto github octocat'
 
diff --git a/__tests__/utils.test.ts b/__tests__/utils.test.ts
index 95fa8f3..d0c5d9b 100644
--- a/__tests__/utils.test.ts
+++ b/__tests__/utils.test.ts
@@ -51,5 +51,18 @@ describe('utils test', () => {
       )
       expect(result).toBe('`@ry-itto`')
     })
+
+    it('multiple slackUsernames', () => {
+      const slackUsernames = `
+      ry-itto,ito ryoya
+      github,octocat
+      `
+      const body = 'ry-itto and github'
+      const result = replaceGitHubUsernameWithSlackUsername(
+        body,
+        slackUsernames
+      )
+      expect(result).toBe('<@ito ryoya> and <@octocat>')
+    })
   })
 })
diff --git a/src/utils.ts b/src/utils.ts
index cdf0087..e9d5fae 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -106,7 +106,7 @@ export const replaceGitHubUsernameWithSlackUsername = (
       if (!value) {
         return result
       }
-      result[key] = value
+      result[key.trim()] = value.trim()
       return result
     }, {}) ?? {}
   for (const [key, value] of Object.entries(githubToSlack)) {