diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 ## Version
 
-`1.3.1`
+`1.3.2`
 
 
 ## Description
diff --git a/amazonka-lambda.cabal b/amazonka-lambda.cabal
--- a/amazonka-lambda.cabal
+++ b/amazonka-lambda.cabal
@@ -1,5 +1,5 @@
 name:                  amazonka-lambda
-version:               1.3.1
+version:               1.3.2
 synopsis:              Amazon Lambda SDK.
 homepage:              https://github.com/brendanhay/amazonka
 bug-reports:           https://github.com/brendanhay/amazonka/issues
@@ -74,7 +74,7 @@
         , Network.AWS.Lambda.Types.Sum
 
     build-depends:
-          amazonka-core == 1.3.1.*
+          amazonka-core == 1.3.2.*
         , base          >= 4.7     && < 5
 
 test-suite amazonka-lambda-test
@@ -94,9 +94,9 @@
         , Test.AWS.Lambda.Internal
 
     build-depends:
-          amazonka-core == 1.3.1.*
-        , amazonka-test == 1.3.1.*
-        , amazonka-lambda == 1.3.1.*
+          amazonka-core == 1.3.2.*
+        , amazonka-test == 1.3.2.*
+        , amazonka-lambda == 1.3.2.*
         , base
         , bytestring
         , lens
diff --git a/gen/Network/AWS/Lambda/Invoke.hs b/gen/Network/AWS/Lambda/Invoke.hs
--- a/gen/Network/AWS/Lambda/Invoke.hs
+++ b/gen/Network/AWS/Lambda/Invoke.hs
@@ -31,10 +31,10 @@
     , Invoke
     -- * Request Lenses
     , iInvocationType
-    , iPayload
     , iLogType
     , iClientContext
     , iFunctionName
+    , iPayload
 
     -- * Destructuring the Response
     , invokeResponse
@@ -55,11 +55,11 @@
 -- | /See:/ 'invoke' smart constructor.
 data Invoke = Invoke'
     { _iInvocationType :: !(Maybe InvocationType)
-    , _iPayload        :: !(Maybe Base64)
     , _iLogType        :: !(Maybe LogType)
     , _iClientContext  :: !(Maybe Text)
     , _iFunctionName   :: !Text
-    } deriving (Eq,Read,Show,Data,Typeable,Generic)
+    , _iPayload        :: !(HashMap Text Value)
+    } deriving (Eq,Show,Data,Typeable,Generic)
 
 -- | Creates a value of 'Invoke' with the minimum fields required to make a request.
 --
@@ -67,23 +67,24 @@
 --
 -- * 'iInvocationType'
 --
--- * 'iPayload'
---
 -- * 'iLogType'
 --
 -- * 'iClientContext'
 --
 -- * 'iFunctionName'
+--
+-- * 'iPayload'
 invoke
     :: Text -- ^ 'iFunctionName'
+    -> HashMap Text Value -- ^ 'iPayload'
     -> Invoke
-invoke pFunctionName_ =
+invoke pFunctionName_ pPayload_ =
     Invoke'
     { _iInvocationType = Nothing
-    , _iPayload = Nothing
     , _iLogType = Nothing
     , _iClientContext = Nothing
     , _iFunctionName = pFunctionName_
+    , _iPayload = pPayload_
     }
 
 -- | By default, the 'Invoke' API assumes \"RequestResponse\" invocation
@@ -97,16 +98,6 @@
 iInvocationType :: Lens' Invoke (Maybe InvocationType)
 iInvocationType = lens _iInvocationType (\ s a -> s{_iInvocationType = a});
 
--- | JSON that you want to provide to your Lambda function as input.
---
--- /Note:/ This 'Lens' automatically encodes and decodes Base64 data,
--- despite what the AWS documentation might say.
--- The underlying isomorphism will encode to Base64 representation during
--- serialisation, and decode from Base64 representation during deserialisation.
--- This 'Lens' accepts and returns only raw unencoded data.
-iPayload :: Lens' Invoke (Maybe ByteString)
-iPayload = lens _iPayload (\ s a -> s{_iPayload = a}) . mapping _Base64;
-
 -- | You can set this optional parameter to \"Tail\" in the request only if
 -- you specify the 'InvocationType' parameter with value
 -- \"RequestResponse\". In this case, AWS Lambda returns the base64-encoded
@@ -139,18 +130,25 @@
 iFunctionName :: Lens' Invoke Text
 iFunctionName = lens _iFunctionName (\ s a -> s{_iFunctionName = a});
 
+-- | JSON that you want to provide to your Lambda function as input.
+iPayload :: Lens' Invoke (HashMap Text Value)
+iPayload = lens _iPayload (\ s a -> s{_iPayload = a});
+
 instance AWSRequest Invoke where
         type Rs Invoke = InvokeResponse
-        request = postJSON lambda
+        request = postBody lambda
         response
           = receiveJSON
               (\ s h x ->
                  InvokeResponse' <$>
                    (h .#? "X-Amz-Function-Error") <*>
                      (h .#? "X-Amz-Log-Result")
-                     <*> (x .?> "Payload")
+                     <*> (pure (Just x))
                      <*> (pure (fromEnum s)))
 
+instance ToBody Invoke where
+        toBody = toBody . _iPayload
+
 instance ToHeaders Invoke where
         toHeaders Invoke'{..}
           = mconcat
@@ -158,10 +156,6 @@
                "X-Amz-Log-Type" =# _iLogType,
                "X-Amz-Client-Context" =# _iClientContext]
 
-instance ToJSON Invoke where
-        toJSON Invoke'{..}
-          = object (catMaybes [("Payload" .=) <$> _iPayload])
-
 instance ToPath Invoke where
         toPath Invoke'{..}
           = mconcat
@@ -177,9 +171,9 @@
 data InvokeResponse = InvokeResponse'
     { _irsFunctionError :: !(Maybe Text)
     , _irsLogResult     :: !(Maybe Text)
-    , _irsPayload       :: !(Maybe Base64)
+    , _irsPayload       :: !(Maybe (HashMap Text Value))
     , _irsStatusCode    :: !Int
-    } deriving (Eq,Read,Show,Data,Typeable,Generic)
+    } deriving (Eq,Show,Data,Typeable,Generic)
 
 -- | Creates a value of 'InvokeResponse' with the minimum fields required to make a request.
 --
@@ -227,14 +221,8 @@
 -- describing the error. For the 'Handled' errors the Lambda function will
 -- report this message. For 'Unhandled' errors AWS Lambda reports the
 -- message.
---
--- /Note:/ This 'Lens' automatically encodes and decodes Base64 data,
--- despite what the AWS documentation might say.
--- The underlying isomorphism will encode to Base64 representation during
--- serialisation, and decode from Base64 representation during deserialisation.
--- This 'Lens' accepts and returns only raw unencoded data.
-irsPayload :: Lens' InvokeResponse (Maybe ByteString)
-irsPayload = lens _irsPayload (\ s a -> s{_irsPayload = a}) . mapping _Base64;
+irsPayload :: Lens' InvokeResponse (Maybe (HashMap Text Value))
+irsPayload = lens _irsPayload (\ s a -> s{_irsPayload = a});
 
 -- | The HTTP status code will be in the 200 range for successful request.
 -- For the \"RequestResonse\" invocation type this status code will be 200.