diff --git a/application/src/Fediverse/RobotsTxt/fetchRobotsTxt.ts b/application/src/Fediverse/RobotsTxt/fetchRobotsTxt.ts
index 13cb1a8..767fb58 100644
--- a/application/src/Fediverse/RobotsTxt/fetchRobotsTxt.ts
+++ b/application/src/Fediverse/RobotsTxt/fetchRobotsTxt.ts
@@ -15,7 +15,7 @@ export default async function fetchRobotsTxt (domain: string): Promise<RobotsTxt
       headers: { 'User-Agent': userAgent },
       timeout: getDefaultTimeoutMilliseconds()
     })
-    content = robotsTxt.data
+    content = String(robotsTxt.data)
   } catch (error) {
     console.info('Robots.txt not found', { error, url })
   }
diff --git a/application/src/Fediverse/assertSuccessJsonResponse.ts b/application/src/Fediverse/assertSuccessJsonResponse.ts
index 830de36..73b1c24 100644
--- a/application/src/Fediverse/assertSuccessJsonResponse.ts
+++ b/application/src/Fediverse/assertSuccessJsonResponse.ts
@@ -11,8 +11,8 @@ export const assertSuccessJsonResponse = (
     throw new UnexpectedResponseStatusError(expectedStatus, actualStatus)
   }
   const expectedContentType = 'application/json'
-  const actualContentType = response.headers['content-type']
+  const actualContentType = String(response.headers['content-type'])
   if (!actualContentType.startsWith(expectedContentType)) {
-    throw new UnexpectedContentTypeError(expectedContentType, actualContentType)
+    throw new UnexpectedContentTypeError(actualContentType, expectedContentType)
   }
 }