diff --git a/src/Xrefcheck/Verify.hs b/src/Xrefcheck/Verify.hs
index 7468ae12..e8c4fcbc 100644
--- a/src/Xrefcheck/Verify.hs
+++ b/src/Xrefcheck/Verify.hs
@@ -768,7 +768,9 @@ checkExternalResource followed config@Config{..} link
           other -> throwError $ ExternalResourceSomeError $ show other
       where
         retryAfterInfo :: Response a -> Maybe RetryAfter
-        retryAfterInfo = readMaybe . decodeUtf8 <=< L.lookup hRetryAfter . responseHeaders
+        retryAfterInfo =
+          readMaybe @_ @Text . decodeUtf8 <=<
+          L.lookup hRetryAfter . responseHeaders
 
     checkFtp :: URI -> Bool -> ExceptT VerifyError IO ()
     checkFtp uri secure = do