diff --git a/amazonka-emr.cabal b/amazonka-emr.cabal
--- a/amazonka-emr.cabal
+++ b/amazonka-emr.cabal
@@ -1,5 +1,5 @@
 name:                  amazonka-emr
-version:               0.0.3
+version:               0.0.4
 synopsis:              Amazon Elastic MapReduce SDK.
 homepage:              https://github.com/brendanhay/amazonka
 license:               OtherLicense
@@ -59,5 +59,5 @@
     other-modules:
 
     build-depends:
-          amazonka-core == 0.0.3.*
+          amazonka-core == 0.0.4.*
         , base          >= 4.7     && < 5
diff --git a/gen/Network/AWS/EMR/DescribeJobFlows.hs b/gen/Network/AWS/EMR/DescribeJobFlows.hs
--- a/gen/Network/AWS/EMR/DescribeJobFlows.hs
+++ b/gen/Network/AWS/EMR/DescribeJobFlows.hs
@@ -64,8 +64,8 @@
 import qualified GHC.Exts
 
 data DescribeJobFlows = DescribeJobFlows
-    { _djfCreatedAfter  :: Maybe ISO8601
-    , _djfCreatedBefore :: Maybe ISO8601
+    { _djfCreatedAfter  :: Maybe POSIX
+    , _djfCreatedBefore :: Maybe POSIX
     , _djfJobFlowIds    :: List "Args" Text
     , _djfJobFlowStates :: List "JobFlowStates" JobFlowExecutionState
     } deriving (Eq, Show)
diff --git a/gen/Network/AWS/EMR/ListClusters.hs b/gen/Network/AWS/EMR/ListClusters.hs
--- a/gen/Network/AWS/EMR/ListClusters.hs
+++ b/gen/Network/AWS/EMR/ListClusters.hs
@@ -55,8 +55,8 @@
 
 data ListClusters = ListClusters
     { _lcClusterStates :: List "ClusterStates" ClusterState
-    , _lcCreatedAfter  :: Maybe ISO8601
-    , _lcCreatedBefore :: Maybe ISO8601
+    , _lcCreatedAfter  :: Maybe POSIX
+    , _lcCreatedBefore :: Maybe POSIX
     , _lcMarker        :: Maybe Text
     } deriving (Eq, Show)
 
diff --git a/gen/Network/AWS/EMR/Types.hs b/gen/Network/AWS/EMR/Types.hs
--- a/gen/Network/AWS/EMR/Types.hs
+++ b/gen/Network/AWS/EMR/Types.hs
@@ -421,8 +421,7 @@
     type Er EMR = JSONError
 
     service = Service
-        { _svcEndpoint     = regional
-        , _svcAbbrev       = "EMR"
+        { _svcAbbrev       = "EMR"
         , _svcPrefix       = "elasticmapreduce"
         , _svcVersion      = "2009-03-31"
         , _svcTargetPrefix = Just "ElasticMapReduce"
@@ -1080,11 +1079,11 @@
         ]
 
 data JobFlowExecutionStatusDetail = JobFlowExecutionStatusDetail
-    { _jfesdCreationDateTime      :: ISO8601
-    , _jfesdEndDateTime           :: Maybe ISO8601
+    { _jfesdCreationDateTime      :: POSIX
+    , _jfesdEndDateTime           :: Maybe POSIX
     , _jfesdLastStateChangeReason :: Maybe Text
-    , _jfesdReadyDateTime         :: Maybe ISO8601
-    , _jfesdStartDateTime         :: Maybe ISO8601
+    , _jfesdReadyDateTime         :: Maybe POSIX
+    , _jfesdStartDateTime         :: Maybe POSIX
     , _jfesdState                 :: JobFlowExecutionState
     } deriving (Eq, Show)
 
@@ -1379,9 +1378,9 @@
         ]
 
 data InstanceTimeline = InstanceTimeline
-    { _itCreationDateTime :: Maybe ISO8601
-    , _itEndDateTime      :: Maybe ISO8601
-    , _itReadyDateTime    :: Maybe ISO8601
+    { _itCreationDateTime :: Maybe POSIX
+    , _itEndDateTime      :: Maybe POSIX
+    , _itReadyDateTime    :: Maybe POSIX
     } deriving (Eq, Ord, Show)
 
 -- | 'InstanceTimeline' constructor.
@@ -1971,9 +1970,9 @@
     toJSON = toJSONText
 
 data StepTimeline = StepTimeline
-    { _stCreationDateTime :: Maybe ISO8601
-    , _stEndDateTime      :: Maybe ISO8601
-    , _stStartDateTime    :: Maybe ISO8601
+    { _stCreationDateTime :: Maybe POSIX
+    , _stEndDateTime      :: Maybe POSIX
+    , _stStartDateTime    :: Maybe POSIX
     } deriving (Eq, Ord, Show)
 
 -- | 'StepTimeline' constructor.
@@ -2170,8 +2169,8 @@
 
 data InstanceGroupDetail = InstanceGroupDetail
     { _igdBidPrice              :: Maybe Text
-    , _igdCreationDateTime      :: ISO8601
-    , _igdEndDateTime           :: Maybe ISO8601
+    , _igdCreationDateTime      :: POSIX
+    , _igdEndDateTime           :: Maybe POSIX
     , _igdInstanceGroupId       :: Maybe Text
     , _igdInstanceRequestCount  :: Int
     , _igdInstanceRole          :: InstanceRoleType
@@ -2180,8 +2179,8 @@
     , _igdLastStateChangeReason :: Maybe Text
     , _igdMarket                :: MarketType
     , _igdName                  :: Maybe Text
-    , _igdReadyDateTime         :: Maybe ISO8601
-    , _igdStartDateTime         :: Maybe ISO8601
+    , _igdReadyDateTime         :: Maybe POSIX
+    , _igdStartDateTime         :: Maybe POSIX
     , _igdState                 :: InstanceGroupState
     } deriving (Eq, Show)
 
@@ -2535,9 +2534,9 @@
     toJSON = toJSONText
 
 data InstanceGroupTimeline = InstanceGroupTimeline
-    { _igtCreationDateTime :: Maybe ISO8601
-    , _igtEndDateTime      :: Maybe ISO8601
-    , _igtReadyDateTime    :: Maybe ISO8601
+    { _igtCreationDateTime :: Maybe POSIX
+    , _igtEndDateTime      :: Maybe POSIX
+    , _igtReadyDateTime    :: Maybe POSIX
     } deriving (Eq, Ord, Show)
 
 -- | 'InstanceGroupTimeline' constructor.
@@ -2615,10 +2614,10 @@
         ]
 
 data StepExecutionStatusDetail = StepExecutionStatusDetail
-    { _sesdCreationDateTime      :: ISO8601
-    , _sesdEndDateTime           :: Maybe ISO8601
+    { _sesdCreationDateTime      :: POSIX
+    , _sesdEndDateTime           :: Maybe POSIX
     , _sesdLastStateChangeReason :: Maybe Text
-    , _sesdStartDateTime         :: Maybe ISO8601
+    , _sesdStartDateTime         :: Maybe POSIX
     , _sesdState                 :: StepExecutionState
     } deriving (Eq, Show)
 
@@ -3433,9 +3432,9 @@
     toJSON = toJSONText
 
 data ClusterTimeline = ClusterTimeline
-    { _ctCreationDateTime :: Maybe ISO8601
-    , _ctEndDateTime      :: Maybe ISO8601
-    , _ctReadyDateTime    :: Maybe ISO8601
+    { _ctCreationDateTime :: Maybe POSIX
+    , _ctEndDateTime      :: Maybe POSIX
+    , _ctReadyDateTime    :: Maybe POSIX
     } deriving (Eq, Ord, Show)
 
 -- | 'ClusterTimeline' constructor.