diff --git a/req.cabal b/req.cabal
index 5b5bdd2..a9f7c6e 100644
--- a/req.cabal
+++ b/req.cabal
@@ -40,7 +40,7 @@ library
         bytestring >=0.10.8 && <0.13,
         case-insensitive >=0.2 && <1.3,
         containers >=0.5 && <0.7,
-        crypton-connection >=0.2.2 && <0.4,
+        crypton-connection >=0.2.2 && <0.5,
         exceptions >=0.6 && <0.11,
         http-api-data >=0.2 && <0.7,
         http-client >=0.7.13.1 && <0.8,