diff --git a/NodeSrv/apps/healthcheck-survey-bot/workflows/hc-sub-run-process-and-notify.json b/NodeSrv/apps/healthcheck-survey-bot/workflows/hc-sub-run-process-and-notify.json
index ea1a56c0..60898f98 100644
--- a/NodeSrv/apps/healthcheck-survey-bot/workflows/hc-sub-run-process-and-notify.json
+++ b/NodeSrv/apps/healthcheck-survey-bot/workflows/hc-sub-run-process-and-notify.json
@@ -102,7 +102,7 @@
         300
       ],
       "parameters": {
-        "jsCode": "const claims = $('JWTクレーム組み立て').item.json;\nconst config = claims.config;\nconst assertion = $json.token;\n\n// LINEWORKS token/message呼び出しはx-www-form-urlencoded / JSONのどちらも\n// this.helpers.httpRequestのbodyに素の値を渡す形は実機未検証のため、\n// URLSearchParamsで明示的にエンコードしてContent-Typeも明示する。\nconst tokenBody = new URLSearchParams({\n  assertion,\n  grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',\n  client_id: config.LW_BOT_CLIENT_ID,\n  client_secret: config.LW_BOT_CLIENT_SECRET,\n  scope: 'bot',\n}).toString();\n\nconst tokenRes = await this.helpers.httpRequest({\n  method: 'POST',\n  url: 'https://auth.worksmobile.com/oauth2/v2.0/token',\n  headers: { 'Content-Type': 'application/x-www-form-urlencoded' },\n  body: tokenBody,\n  json: true,\n});\nconst accessToken = tokenRes.access_token;\nif (!accessToken) {\n  throw new Error('LINEWORKSアクセストークンの取得に失敗しました。');\n}\n\nconst sendRes = await this.helpers.httpRequest({\n  method: 'POST',\n  url: claims.apiUrl,\n  headers: {\n    Authorization: `Bearer ${accessToken}`,\n    'Content-Type': 'application/json;charset=UTF-8',\n  },\n  body: { content: claims.messageContent },\n  json: true,\n});\n\nreturn [{\n  json: {\n    resultId: claims.resultId,\n    currentStatus: claims.currentStatus,\n    options: claims.options,\n    targetEmail: claims.targetEmail,\n    lineworksResponse: sendRes,\n  },\n}];"
+        "jsCode": "const claims = $('JWTクレーム組み立て').item.json;\nconst config = claims.config;\nconst assertion = $json.token;\n\n// LINEWORKS tokenエンドポイントはx-www-form-urlencodedのみ受け付ける。\n// this.helpers.httpRequestはbodyにURLSearchParamsインスタンスを渡すと\n// application/x-www-form-urlencodedへの変換とContent-Type設定を自動で\n// 行うため、素のURLSearchParamsを渡す（.toString()しない、ヘッダーも手動指定しない）。\n// jsonオプションは指定しないため、レスポンスは自前でJSON.parseする。\nconst tokenBody = new URLSearchParams({\n  assertion,\n  grant_type: 'urn:ietf:params:oauth:grant-type:jwt-bearer',\n  client_id: config.LW_BOT_CLIENT_ID,\n  client_secret: config.LW_BOT_CLIENT_SECRET,\n  scope: 'bot',\n});\n\nconst tokenRes = await this.helpers.httpRequest({\n  method: 'POST',\n  url: 'https://auth.worksmobile.com/oauth2/v2.0/token',\n  body: tokenBody,\n});\nconst tokenJson = typeof tokenRes === 'string' ? JSON.parse(tokenRes) : tokenRes;\nconst accessToken = tokenJson.access_token;\nif (!accessToken) {\n  throw new Error('LINEWORKSアクセストークンの取得に失敗しました。');\n}\n\nconst sendRes = await this.helpers.httpRequest({\n  method: 'POST',\n  url: claims.apiUrl,\n  headers: {\n    Authorization: `Bearer ${accessToken}`,\n    'Content-Type': 'application/json;charset=UTF-8',\n  },\n  body: { content: claims.messageContent },\n  json: true,\n});\n\nreturn [{\n  json: {\n    resultId: claims.resultId,\n    currentStatus: claims.currentStatus,\n    options: claims.options,\n    targetEmail: claims.targetEmail,\n    lineworksResponse: sendRes,\n  },\n}];"
       }
     },
     {