diff --git a/HaskellNet-SSL.cabal b/HaskellNet-SSL.cabal
index 899f322..928a91d 100644
--- a/HaskellNet-SSL.cabal
+++ b/HaskellNet-SSL.cabal
@@ -42,7 +42,7 @@ library
   else
     build-depends:     base >= 4 && < 5,
                        HaskellNet >= 0.3 && < 0.5,
-                       tls == 1.2.*,
+                       tls >= 1.2 && < 1.4,
                        connection == 0.2.*,
                        network >= 2.4 && < 2.7,
                        bytestring,