diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,28 @@
 The format is based on [Keep a Changelog](http://keepachangelog.com/en/1.0.0/)
 and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.html)
 
+## 0.51.0
+### Fixed
+- Data type for RequestTooLarge was missing.
+
+## 0.50.3
+### Added
+- Log HTTP request bodies.
+
+### Removed
+- Remove web request timeout.
+
+### Fixed
+- Do not ignore unknown start tx anchors in conduits.
+- Use fast transaction counting in cache.
+
+### Changed
+- Use WAI middlewares to manage stats.
+
+## 0.50.2
+### Fixed
+- Do not use lazy parsers for incoming data that may throw exceptions.
+
 ## 0.50.1
 ### Fixed
 - Do not allow incoming POST requests of unlimited body size.
diff --git a/haskoin-store-data.cabal b/haskoin-store-data.cabal
--- a/haskoin-store-data.cabal
+++ b/haskoin-store-data.cabal
@@ -4,10 +4,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 13f8f0ba579a236b57f68a26931aa6432e0f8764138f16dba038e157f3c01c76
+-- hash: 0b8de92bdb68810249bfd7cce65a70ac0f0d175350afcb656d80ed2d7576b6fd
 
 name:           haskoin-store-data
-version:        0.50.1
+version:        0.51.0
 synopsis:       Data for Haskoin Store
 description:    Please see the README on GitHub at <https://github.com/haskoin/haskoin-store#readme>
 category:       Bitcoin, Finance, Network
diff --git a/src/Haskoin/Store/Data.hs b/src/Haskoin/Store/Data.hs
--- a/src/Haskoin/Store/Data.hs
+++ b/src/Haskoin/Store/Data.hs
@@ -2101,46 +2101,9 @@
     | StringError !String
     | TxIndexConflict ![TxHash]
     | ServerTimeout
+    | RequestTooLarge
     deriving (Show, Eq, Ord, Generic, NFData)
 
-instance Serial Except where
-    serialize ThingNotFound =
-        putWord8 0x00
-    serialize ServerError =
-        putWord8 0x01
-    serialize BadRequest =
-        putWord8 0x02
-    serialize (UserError s) = do
-        putWord8 0x03
-        putLengthBytes (TE.encodeUtf8 (T.pack s))
-    serialize (StringError s) = do
-        putWord8 0x04
-        putLengthBytes (TE.encodeUtf8 (T.pack s))
-    serialize (TxIndexConflict ts) = do
-        putWord8 0x05
-        putList serialize ts
-    serialize ServerTimeout = do
-        putWord8 0x06
-
-    deserialize =
-        getWord8 >>= \case
-        0x00 -> return ThingNotFound
-        0x01 -> return ServerError
-        0x02 -> return BadRequest
-        0x03 -> UserError . T.unpack . TE.decodeUtf8 <$> getLengthBytes
-        0x04 -> StringError . T.unpack . TE.decodeUtf8 <$> getLengthBytes
-        0x05 -> TxIndexConflict <$> getList deserialize
-        0x06 -> return ServerTimeout
-        _    -> fail "Cannot recognize exception"
-
-instance Serialize Except where
-    put = serialize
-    get = deserialize
-
-instance Binary Except where
-    put = serialize
-    get = deserialize
-
 instance Exception Except
 
 instance ScottyError Except where
@@ -2174,6 +2137,9 @@
             ServerTimeout ->
                 [ "error" .= String "server-timeout"
                 , "message" .= String "Request is taking too long" ]
+            RequestTooLarge ->
+                [ "error" .= String "request-too-large"
+                , "message" .= String "Request body too large" ]
 
 instance FromJSON Except where
     parseJSON =
@@ -2196,6 +2162,8 @@
                     return $ TxIndexConflict txids
                 String "server-timeout" ->
                     return ServerTimeout
+                String "request-too-large" ->
+                    return RequestTooLarge
                 _ -> mzero
 
 toIntTxId :: TxHash -> Word64
diff --git a/src/Haskoin/Store/WebClient.hs b/src/Haskoin/Store/WebClient.hs
--- a/src/Haskoin/Store/WebClient.hs
+++ b/src/Haskoin/Store/WebClient.hs
@@ -66,6 +66,7 @@
 import           Control.Exception
 import           Control.Lens              ((.~), (?~), (^.))
 import           Control.Monad.Except
+import qualified Data.Aeson                as A
 import           Data.Bytes.Get
 import           Data.Bytes.Put
 import           Data.Bytes.Serial
@@ -237,11 +238,11 @@
     | statusIsSuccessful status = return ()
     | isHealthPath && code == 503 = return () -- Ignore health checks
     | otherwise = do
-        e <- runGetS deserialize <$> res ^. HTTP.responseBody
+        e <- A.decodeStrict <$> res ^. HTTP.responseBody
         throwIO $
             case e of
-                Right except -> except :: Store.Except
-                _            -> Store.StringError err
+                Just except -> except :: Store.Except
+                Nothing     -> Store.StringError "could not decode error"
   where
     code = res ^. HTTP.responseStatus . HTTP.statusCode
     message = res ^. HTTP.responseStatus . HTTP.statusMessage
diff --git a/test/Haskoin/Store/DataSpec.hs b/test/Haskoin/Store/DataSpec.hs
--- a/test/Haskoin/Store/DataSpec.hs
+++ b/test/Haskoin/Store/DataSpec.hs
@@ -47,7 +47,6 @@
     , SerialBox (arbitrary :: Gen (GenericResult BlockData))
     , SerialBox (arbitrary :: Gen (RawResult BlockData))
     , SerialBox (arbitrary :: Gen (RawResultList BlockData))
-    , SerialBox (arbitrary :: Gen Except)
     ]
 
 jsonVals :: [JsonBox]