diff --git a/amazonka-swf.cabal b/amazonka-swf.cabal
--- a/amazonka-swf.cabal
+++ b/amazonka-swf.cabal
@@ -1,5 +1,5 @@
 name:                  amazonka-swf
-version:               0.0.3
+version:               0.0.4
 synopsis:              Amazon Simple Workflow Service SDK.
 homepage:              https://github.com/brendanhay/amazonka
 license:               OtherLicense
@@ -77,5 +77,5 @@
     other-modules:
 
     build-depends:
-          amazonka-core == 0.0.3.*
+          amazonka-core == 0.0.4.*
         , base          >= 4.7     && < 5
diff --git a/gen/Network/AWS/SWF/DescribeWorkflowExecution.hs b/gen/Network/AWS/SWF/DescribeWorkflowExecution.hs
--- a/gen/Network/AWS/SWF/DescribeWorkflowExecution.hs
+++ b/gen/Network/AWS/SWF/DescribeWorkflowExecution.hs
@@ -96,7 +96,7 @@
 data DescribeWorkflowExecutionResponse = DescribeWorkflowExecutionResponse
     { _dwerExecutionConfiguration      :: WorkflowExecutionConfiguration
     , _dwerExecutionInfo               :: WorkflowExecutionInfo
-    , _dwerLatestActivityTaskTimestamp :: Maybe ISO8601
+    , _dwerLatestActivityTaskTimestamp :: Maybe POSIX
     , _dwerLatestExecutionContext      :: Maybe Text
     , _dwerOpenCounts                  :: WorkflowExecutionOpenCounts
     } deriving (Eq, Show)
diff --git a/gen/Network/AWS/SWF/Types.hs b/gen/Network/AWS/SWF/Types.hs
--- a/gen/Network/AWS/SWF/Types.hs
+++ b/gen/Network/AWS/SWF/Types.hs
@@ -790,8 +790,7 @@
     type Er SWF = JSONError
 
     service = Service
-        { _svcEndpoint     = regional
-        , _svcAbbrev       = "SWF"
+        { _svcAbbrev       = "SWF"
         , _svcPrefix       = "swf"
         , _svcVersion      = "2012-01-25"
         , _svcTargetPrefix = Just "SimpleWorkflowService"
@@ -1003,8 +1002,8 @@
         ]
 
 data ExecutionTimeFilter = ExecutionTimeFilter
-    { _etfLatestDate :: Maybe ISO8601
-    , _etfOldestDate :: ISO8601
+    { _etfLatestDate :: Maybe POSIX
+    , _etfOldestDate :: POSIX
     } deriving (Eq, Ord, Show)
 
 -- | 'ExecutionTimeFilter' constructor.
@@ -1762,8 +1761,8 @@
         ]
 
 data WorkflowTypeInfo = WorkflowTypeInfo
-    { _wtiCreationDate    :: ISO8601
-    , _wtiDeprecationDate :: Maybe ISO8601
+    { _wtiCreationDate    :: POSIX
+    , _wtiDeprecationDate :: Maybe POSIX
     , _wtiDescription     :: Maybe Text
     , _wtiStatus          :: RegistrationStatus
     , _wtiWorkflowType    :: WorkflowType
@@ -2608,8 +2607,8 @@
 
 data ActivityTypeInfo = ActivityTypeInfo
     { _atiActivityType    :: ActivityType
-    , _atiCreationDate    :: ISO8601
-    , _atiDeprecationDate :: Maybe ISO8601
+    , _atiCreationDate    :: POSIX
+    , _atiDeprecationDate :: Maybe POSIX
     , _atiDescription     :: Maybe Text
     , _atiStatus          :: RegistrationStatus
     } deriving (Eq, Show)
@@ -4721,11 +4720,11 @@
 data WorkflowExecutionInfo = WorkflowExecutionInfo
     { _weiCancelRequested :: Maybe Bool
     , _weiCloseStatus     :: Maybe CloseStatus
-    , _weiCloseTimestamp  :: Maybe ISO8601
+    , _weiCloseTimestamp  :: Maybe POSIX
     , _weiExecution       :: WorkflowExecution
     , _weiExecutionStatus :: ExecutionStatus
     , _weiParent          :: Maybe WorkflowExecution
-    , _weiStartTimestamp  :: ISO8601
+    , _weiStartTimestamp  :: POSIX
     , _weiTagList         :: List "tagList" Text
     , _weiWorkflowType    :: WorkflowType
     } deriving (Eq, Show)
@@ -6419,7 +6418,7 @@
     , _heDecisionTaskStartedEventAttributes                             :: Maybe DecisionTaskStartedEventAttributes
     , _heDecisionTaskTimedOutEventAttributes                            :: Maybe DecisionTaskTimedOutEventAttributes
     , _heEventId                                                        :: Integer
-    , _heEventTimestamp                                                 :: ISO8601
+    , _heEventTimestamp                                                 :: POSIX
     , _heEventType                                                      :: EventType
     , _heExternalWorkflowExecutionCancelRequestedEventAttributes        :: Maybe ExternalWorkflowExecutionCancelRequestedEventAttributes
     , _heExternalWorkflowExecutionSignaledEventAttributes               :: Maybe ExternalWorkflowExecutionSignaledEventAttributes