diff --git a/atndapi.cabal b/atndapi.cabal
--- a/atndapi.cabal
+++ b/atndapi.cabal
@@ -1,5 +1,5 @@
 name:                atndapi
-version:             0.1.0.0
+version:             0.1.1.0
 synopsis:            An interface of ATND API
 description:         Please see README.md
 homepage:            http://github.com/ynishi/atndapi#readme
diff --git a/src/Web/ATND/Event.hs b/src/Web/ATND/Event.hs
--- a/src/Web/ATND/Event.hs
+++ b/src/Web/ATND/Event.hs
@@ -42,11 +42,11 @@
            startedAt :: ATNDTime,
            endedAt :: ATNDTime,
            url :: Maybe Text,
-           limit :: Integer,
+           limit :: Maybe Integer,
            address :: Text,
            place :: Text,
-           lat :: Text,
-           lon :: Text,
+           lat :: Maybe Text,
+           lon :: Maybe Text,
            owner :: Web.ATND.Util.Person,
            accepted :: Integer,
            waiting :: Integer,
@@ -134,11 +134,11 @@
                            (e >>= (.: "started_at")) <*>
                            (e >>= (.: "ended_at")) <*>
                            (e >>= (.:? "url")) <*>
-                           (e >>= (.: "limit")) <*>
+                           (e >>= (.:? "limit")) <*>
                            (e >>= (.: "address")) <*>
                            (e >>= (.: "place")) <*>
-                           (e >>= (.: "lat")) <*>
-                           (e >>= (.: "lon")) <*>
+                           (e >>= (.:? "lat")) <*>
+                           (e >>= (.:? "lon")) <*>
                            (Web.ATND.Util.Person <$>
                              (e >>= (.: "owner_id")) <*>
                              (e >>= (.: "owner_nickname")) <*>