diff --git a/servant-server/servant-server.cabal b/servant-server/servant-server.cabal
index 116c0a10..8aea2e55 100644
--- a/servant-server/servant-server.cabal
+++ b/servant-server/servant-server.cabal
@@ -41,7 +41,7 @@ library
   build-depends:
         base               >= 4.7  && < 5
       , aeson              >= 0.7  && < 0.9
-      , attoparsec         >= 0.12 && < 0.13
+      , attoparsec         >= 0.12 && < 0.14
       , bytestring         >= 0.10 && < 0.11
       , either             >= 4.3  && < 4.4
       , http-types         >= 0.8  && < 0.9