diff --git a/Changelog.md b/Changelog.md
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,7 @@
+## 0.4.3
+
+Fix build for lts-15.1 and time-1.9.3
+
 ## 0.4.2
 
-- Adds `Mail.Hailgun.Internal` module, which exposes private APIs for constructing a `HailgunMessage`.
+Adds `Mail.Hailgun.Internal` module, which exposes private APIs for constructing a `HailgunMessage`.
diff --git a/Mail/Hailgun/Internal/Data.hs b/Mail/Hailgun/Internal/Data.hs
--- a/Mail/Hailgun/Internal/Data.hs
+++ b/Mail/Hailgun/Internal/Data.hs
@@ -22,6 +22,9 @@
 import qualified Data.Text            as T
 import           Data.Time.Clock      (UTCTime (..))
 import           Data.Time.Format     (ParseTime (..), parseTime)
+#if MIN_VERSION_time(1,9,0)
+import           Data.Time.Format.Internal (ParseTime (..))
+#endif
 import           Data.Time.LocalTime  (zonedTimeToUTC)
 import qualified Network.HTTP.Client  as NHC
 import qualified Text.Email.Validate  as TEV
diff --git a/hailgun.cabal b/hailgun.cabal
--- a/hailgun.cabal
+++ b/hailgun.cabal
@@ -10,7 +10,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             0.4.2
+version:             0.4.3
 
 -- A short (one-line) description of the package.
 synopsis:            Mailgun REST api interface for Haskell.
@@ -36,7 +36,7 @@
 -- A copyright notice.
 copyright:           (c) 2014-2018 Robert Massaioli
 
-homepage:            https://bitbucket.org/robertmassaioli/hailgun
+homepage:            https://bitbucket.org/echo_rm/hailgun
 
 category:            Network
 
@@ -78,7 +78,7 @@
                         , email-validate     >= 2.0 && < 2.4
                         , exceptions         >= 0.8
                         , filepath           >= 1 && < 2
-                        , http-client        >= 0.4 && < 0.6
+                        , http-client        >= 0.4 && < 0.7
                         , http-client-tls    >= 0.2 && < 0.4
                         , http-types         >= 0.8
                         , tagsoup            >= 0.13 && < 0.15