diff --git a/app/Handler/User.hs b/app/Handler/User.hs
--- a/app/Handler/User.hs
+++ b/app/Handler/User.hs
@@ -129,10 +129,10 @@
     <*> areq textField (localizedFS MsgUserFirst) (uFirstName <$> muser)
     <*> areq textField (localizedFS MsgUserLast) (uLastName <$> muser)
     <*> aopt textField (localizedFS MsgUserAddress) (uAddress <$> muser)
-    <*> (day2Posix <$> areq (jqueryDayField def
+    <*> (dayToMpTime <$> areq (jqueryDayField def
         { jdsChangeYear = True -- give a year dropdown
         , jdsYearRange = "1900:-5" -- 1900 till five years ago
-        }) (localizedFS MsgUserBirthday) (posix2Day <$> uBirthday <$> muser))
+        }) (localizedFS MsgUserBirthday) (mpTimeToDay <$> uBirthday <$> muser))
     <*> areq countryField (localizedFS MsgUserNationality)  (uNationality <$> muser)
     <*> areq countryField (localizedFS MsgUserCountry) (uCountryOfResidence <$> muser)
     <*> aopt textField (localizedFS MsgUserOccupation) (uOccupation <$> muser)
@@ -155,10 +155,10 @@
     <*> areq textField (localizedFS MsgUserRepLast) (lLegalRepresentativeLastName <$> muser)
     <*> aopt textField (localizedFS MsgUserRepAddress) (lLegalRepresentativeAddress <$> muser)
     <*> aopt textField (localizedFS MsgUserRepEmail) (lLegalRepresentativeEmail <$> muser)
-    <*> (day2Posix <$> areq (jqueryDayField def
+    <*> (dayToMpTime <$> areq (jqueryDayField def
         { jdsChangeYear = True -- give a year dropdown
         , jdsYearRange = "1900:-5" -- 1900 till five years ago
-        }) (localizedFS MsgUserRepBirthday) (posix2Day <$> lLegalRepresentativeBirthday <$> muser))
+        }) (localizedFS MsgUserRepBirthday) (mpTimeToDay <$> lLegalRepresentativeBirthday <$> muser))
     <*> areq countryField (localizedFS MsgUserRepNationality) (lLegalRepresentativeNationality <$> muser)
     <*> areq countryField (localizedFS MsgUserRepCountry) (lLegalRepresentativeCountryOfResidence <$> muser)
     <*> pure Nothing  -- value comes from Documents uploaded (I think)
diff --git a/src/Yesod/MangoPay/Util.hs b/src/Yesod/MangoPay/Util.hs
--- a/src/Yesod/MangoPay/Util.hs
+++ b/src/Yesod/MangoPay/Util.hs
@@ -4,11 +4,12 @@
 import Data.Time.Clock.POSIX
 import Data.Time.Clock
 import Data.Time.Calendar
+import Web.MangoPay (MpTime(..))
 
 -- | day to posix time
-day2Posix :: Day -> POSIXTime
-day2Posix d=utcTimeToPOSIXSeconds $ UTCTime d 0
+dayToMpTime :: Day -> MpTime
+dayToMpTime = MpTime . utcTimeToPOSIXSeconds . flip UTCTime 0
 
 -- | posix time to Day
-posix2Day :: POSIXTime -> Day
-posix2Day =utctDay . posixSecondsToUTCTime
+mpTimeToDay :: MpTime -> Day
+mpTimeToDay = utctDay . posixSecondsToUTCTime . unMpTime
diff --git a/yesod-mangopay.cabal b/yesod-mangopay.cabal
--- a/yesod-mangopay.cabal
+++ b/yesod-mangopay.cabal
@@ -1,5 +1,5 @@
 name:           yesod-mangopay
-version:        1.11.5
+version:        1.12
 cabal-version:  >= 1.8
 build-type:     Simple
 author:         JP Moresmau <jpmoresmau@gmail.com>
@@ -34,13 +34,13 @@
     hs-source-dirs:    src
     build-depends:
                    base         >= 4      && < 5
-                 , mangopay     == 1.11.*
+                 , mangopay     == 1.12.*
                  , containers   >= 0.5    && < 0.6
                  , http-conduit >= 2.0    && < 2.2
-                 , http-types   >= 0.8.2  && < 0.9
+                 , http-types   >= 0.8.2  && < 0.10
                  , lifted-base  >= 0.2.1  && < 0.3
                  , text         >= 0.11.3
-                 , time         >= 1.4.0  && < 1.6
+                 , time         >= 1.4.0  && < 1.7
                  , yesod        == 1.4.*
                  , yesod-core   == 1.4.*
                  , persistent-template >= 2.1 && < 3
@@ -110,10 +110,10 @@
                  , resourcet
                  , shakespeare                   >= 2.0
                  , template-haskell
-                 , wai                           >= 2.1        && < 3.1
+                 , wai                           >= 2.1        && < 3.3
                  , wai-extra
                  , wai-logger                    >= 2.1        && < 2.3
-                 , warp                          >= 2.1        && < 3.2
+                 , warp                          >= 2.1        && < 3.3
                  , yaml                          >= 0.8        && < 0.9
                  , yesod-auth
                  , yesod-form