diff --git a/pagerduty.cabal b/pagerduty.cabal
--- a/pagerduty.cabal
+++ b/pagerduty.cabal
@@ -1,5 +1,5 @@
 name:                  pagerduty
-version:               0.0.2
+version:               0.0.3
 synopsis:              Client library for PagerDuty Integration and REST APIs.
 homepage:              http://github.com/brendanhay/pagerduty
 license:               OtherLicense
@@ -72,24 +72,25 @@
 
     build-depends:
         aeson                 == 0.8.*
-      , base                  >= 4.5     && < 5
-      , bifunctors            >= 4.1     && < 5
+      , base                  >= 4.5      && < 5
+      , bifunctors            >= 4.1      && < 5
       , bytestring            >= 0.9
       , bytestring-conversion >= 0.2.1
-      , conduit               >  1.1     && < 1.3
+      , conduit               >  1.1      && < 1.3
       , data-default-class    >= 0.0.1
       , exceptions            >= 0.6
       , generics-sop          >= 0.1.0.2
-      , http-client           >= 0.4.3   && < 0.5
+      , http-client           >= 0.4.3    && < 0.5
       , http-types            >= 0.8
-      , lens                  >= 4.4     && < 5
+      , lens                  >= 4.4      && < 5
       , lens-aeson            >= 1
-      , mmorph                >= 1       && < 2
-      , monad-control         >= 1       && < 2
+      , mmorph                >= 1        && < 2
+      , monad-control         >= 1        && < 2
       , mtl                   >= 2.1.3.1
       , template-haskell      >= 2.2
       , text                  >= 1.1
-      , time                  >= 1.5
+      , time                  >= 1.2      && < 1.6
+      , time-locale-compat    >= 0.1.0.1
       , transformers          >= 0.2
       , transformers-compat   >= 0.3
       , transformers-base     >= 0.4.2
diff --git a/src/Network/PagerDuty/Internal/Types.hs b/src/Network/PagerDuty/Internal/Types.hs
--- a/src/Network/PagerDuty/Internal/Types.hs
+++ b/src/Network/PagerDuty/Internal/Types.hs
@@ -50,6 +50,7 @@
 import           Network.HTTP.Types.QueryLike
 import           Network.PagerDuty.Internal.Query
 import           Network.PagerDuty.Internal.TH
+import           Data.Time.Locale.Compat
 
 newtype CSV a = CSV [a]
     deriving (Eq, Show, Monoid)
@@ -105,7 +106,7 @@
 
 instance ToByteString Date where
     builder (D d) = builder
-        (formatTime defaultTimeLocale (iso8601DateFormat $ Just "%XZ") d)
+        (formatTime defaultTimeLocale ("%Y-%m-%dT%XZ") d)
 
 instance QueryValues Date