diff --git a/.gitignore b/.gitignore
index d748729..585b6ce 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@
 *.egg-info/
 .tox
 dist/
+__pycache__/
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0740e34..f1ee5a8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
 # Slackers change log
+
+## 1.0.4
+### Fixed
+- Updated Pydantic model `SlackEnvelope` due to Slack side change
+
 ## 1.0.3
 ### Added
 - Update dependencies.
diff --git a/pyproject.toml b/pyproject.toml
index e2545dc..a7becc1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "slackers"
-version = "1.0.3"
+version = "1.0.4"
 readme = "README.md"
 homepage = "https://github.com/uhavin/slackers"
 repository = "https://github.com/uhavin/slackers"
diff --git a/src/slackers/models.py b/src/slackers/models.py
index e16e510..4d48013 100644
--- a/src/slackers/models.py
+++ b/src/slackers/models.py
@@ -13,13 +13,18 @@ class SlackChallenge(SlackBase):
 
 
 class SlackEnvelope(SlackBase):
+    class Config:
+        extra = "allow"
+        
     team_id: str
     api_app_id: str
     event: dict
     type: str
-    authed_users: Optional[List[str]]
     event_id: str
     event_time: int
+    authorizations: Optional[List[dict]]
+    is_ext_shared_channel: Optional[bool]
+    event_context: Optional[str]
 
 
 class SlackAction(SlackBase):