diff --git a/json-rpc.cabal b/json-rpc.cabal
--- a/json-rpc.cabal
+++ b/json-rpc.cabal
@@ -1,5 +1,5 @@
 name:                   json-rpc
-version:                0.2.1.0
+version:                0.2.1.1
 synopsis:               Fully-featured JSON-RPC 2.0 library
 description:
   This JSON-RPC library is fully-compatible with JSON-RPC 2.0 and
@@ -22,17 +22,17 @@
   other-modules:        Network.JsonRpc.Data,
                         Network.JsonRpc.Conduit
   build-depends:        base                        >= 4.6      && < 5,
-                        aeson                       >= 0.7.0.5  && < 0.9,
+                        aeson                       >= 0.8      && < 0.9,
                         async                       >= 2.0      && < 2.1,
                         bytestring                  >= 0.10     && < 0.11,
-                        conduit                     >= 1.1      && < 1.3,
-                        conduit-extra               >= 1.1      && < 1.3,
+                        conduit                     >= 1.2      && < 1.3,
+                        conduit-extra               >= 1.1      && < 1.2,
                         deepseq                     >= 1.3      && < 1.4,
                         hashable                    >= 1.2      && < 1.3,
-                        mtl                         >= 2.1      && < 2.3,
+                        mtl                         >= 2.2      && < 2.3,
                         stm                         >= 2.4      && < 2.5,
-                        stm-conduit                 >= 2.4      && < 2.6,
-                        text                        >= 1.1      && < 1.3,
+                        stm-conduit                 >= 2.5      && < 2.6,
+                        text                        >= 1.2      && < 1.3,
                         unordered-containers        >= 0.2      && < 0.3
   default-language:     Haskell2010
   ghc-options:          -Wall
@@ -44,18 +44,18 @@
   other-modules:        Network.JsonRpc.Tests,
                         Network.JsonRpc.Arbitrary
   build-depends:        base                        >= 4.6      && < 5,
-                        aeson                       >= 0.7.0.5  && < 0.9,
+                        aeson                       >= 0.8      && < 0.9,
                         async                       >= 2.0      && < 2.1,
                         bytestring                  >= 0.10     && < 0.11,
-                        conduit                     >= 1.1      && < 1.3,
-                        conduit-extra               >= 1.1      && < 1.3,
+                        conduit                     >= 1.2      && < 1.3,
+                        conduit-extra               >= 1.1      && < 1.2,
                         deepseq                     >= 1.3      && < 1.4,
                         hashable                    >= 1.2      && < 1.3,
                         json-rpc                    >= 0.2      && < 0.3,
-                        mtl                         >= 2.1      && < 2.3,
+                        mtl                         >= 2.2      && < 2.3,
                         stm                         >= 2.4      && < 2.5,
-                        stm-conduit                 >= 2.4      && < 2.6,
-                        text                        >= 1.1      && < 1.3,
+                        stm-conduit                 >= 2.5      && < 2.6,
+                        text                        >= 1.2      && < 1.3,
                         unordered-containers        >= 0.2      && < 0.3,
                         QuickCheck                  >= 2.6      && < 2.8,
                         test-framework              >= 0.8      && < 0.9,