diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 # Changelog
 
+## 0.1.5.0
+
+- Add missing attributes for the Event.Change
+- Add getClientWithManager to support custom Manager
+
 ## 0.1.4.0
 
 - Set GerritAuthor name field as optional
diff --git a/gerrit.cabal b/gerrit.cabal
--- a/gerrit.cabal
+++ b/gerrit.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.4
 name:                gerrit
-version:             0.1.4.0
+version:             0.1.5.0
 synopsis:            A gerrit client library
 description:
     Gerrit is a client library to interface with https://www.gerritcodereview.com/
diff --git a/src/Gerrit.hs b/src/Gerrit.hs
--- a/src/Gerrit.hs
+++ b/src/Gerrit.hs
@@ -6,6 +6,7 @@
     GerritClient,
     withClient,
     getClient,
+    getClientWithManager,
 
     -- * Api
     getVersion,
diff --git a/src/Gerrit/Client.hs b/src/Gerrit/Client.hs
--- a/src/Gerrit/Client.hs
+++ b/src/Gerrit/Client.hs
@@ -8,6 +8,7 @@
     gerritGet,
     gerritPost,
     getClient,
+    getClientWithManager,
   )
 where
 
@@ -29,9 +30,14 @@
 -- | Need to be call through withOpenSSL
 getClient :: Text -> Maybe (Text, Text) -> IO GerritClient
 getClient url auth = do
-  let baseUrl = T.dropWhileEnd (== '/') url <> "/"
   manager <- newOpenSSLManager
-  pure $ GerritClient {..}
+  pure $ getClientWithManager manager url auth
+
+-- | Creates a GerritClient with a provided http manager.
+getClientWithManager :: Manager -> Text -> Maybe (Text, Text) -> GerritClient
+getClientWithManager manager url auth =
+  let baseUrl = T.dropWhileEnd (== '/') url <> "/"
+   in GerritClient {..}
 
 -- | Create the 'GerritClient'
 withClient ::
diff --git a/src/Gerrit/Data/Event.hs b/src/Gerrit/Data/Event.hs
--- a/src/Gerrit/Data/Event.hs
+++ b/src/Gerrit/Data/Event.hs
@@ -94,7 +94,10 @@
     changeSubject :: Text,
     changeNumber :: Int,
     changeUrl :: Text,
-    changeOwner :: User
+    changeOwner :: User,
+    changeWip :: Maybe Bool,
+    changeTopic :: Maybe Text,
+    changeCreatedOn :: Int64
   }
   deriving (Show, Eq, Generic)
 
diff --git a/test/Spec.hs b/test/Spec.hs
--- a/test/Spec.hs
+++ b/test/Spec.hs
@@ -66,6 +66,9 @@
         testCase "Test EventRefUpdated.json" $
           assertBool "EventRefUpdated is decoded" $
             isEventRefUpdated $ decode $ getRaw "EventRefUpdated.json",
+        testCase "Test EventWipStateChanged.json" $
+          assertBool "EventWipStateChanged is decoded" $
+            isEventWIPChanged $ decode $ getRaw "EventWipStateChanged.json",
         testCase "Test ReviewResult.json" $
           assertBool "ReviewResult is decoded" $
             isReviewResult $ decode $ getRaw "ReviewResult.json",
@@ -106,6 +109,9 @@
       _ -> False
     isEventRefUpdated = \case
       Just (Event.EventRefUpdated _) -> True
+      _ -> False
+    isEventWIPChanged = \case
+      Just (Event.EventWorkInProgressStateChanged _) -> True
       _ -> False
     isChange :: Maybe GerritChange -> Bool
     isChange = \case
diff --git a/test/data/EventWipStateChanged.json b/test/data/EventWipStateChanged.json
new file mode 100644
--- /dev/null
+++ b/test/data/EventWipStateChanged.json
@@ -0,0 +1,54 @@
+{
+  "changer": {
+    "name": "Tristan de Cacqueray",
+    "email": "tdecacqu@redhat.com",
+    "username": "TristanCacqueray"
+  },
+  "patchSet": {
+    "number": 6,
+    "revision": "dbe1837841ddd1278677214d77a5365fab68ba88",
+    "parents": [
+      "3a0179a4f5c3e6149aab53b5176157dfca48ad5f"
+    ],
+    "ref": "refs/changes/54/23354/6",
+    "uploader": {
+      "name": "Tristan de Cacqueray",
+      "email": "tdecacqu@redhat.com",
+      "username": "TristanCacqueray"
+    },
+    "createdOn": 1642448281,
+    "author": {
+      "name": "Tristan de Cacqueray",
+      "email": "tdecacqu@redhat.com",
+      "username": "TristanCacqueray"
+    },
+    "kind": "REWORK",
+    "sizeInsertions": 17,
+    "sizeDeletions": 10
+  },
+  "change": {
+    "project": "software-factory/sf-config",
+    "branch": "3.6",
+    "topic": "gerrit-3.4",
+    "id": "I9b8f6a4d8a379b8c82a10a84aa7d9e8850a72ef6",
+    "number": 23354,
+    "subject": "Add support for gerrit 3.4",
+    "owner": {
+      "name": "Tristan de Cacqueray",
+      "email": "tdecacqu@redhat.com",
+      "username": "TristanCacqueray"
+    },
+    "url": "https://softwarefactory-project.io/r/c/software-factory/sf-config/+/23354",
+    "commitMessage": "Add support for gerrit 3.4\n\nChange-Id: I9b8f6a4d8a379b8c82a10a84aa7d9e8850a72ef6\n",
+    "createdOn": 1638894090,
+    "status": "NEW",
+    "wip": true
+  },
+  "project": "software-factory/sf-config",
+  "refName": "refs/heads/3.6",
+  "changeKey": {
+    "id": "I9b8f6a4d8a379b8c82a10a84aa7d9e8850a72ef6"
+  },
+  "type": "wip-state-changed",
+  "eventCreatedOn": 1642513882
+}