diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index e467699..5e106c2 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -13,7 +13,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.9]
+        python-version: [3.8]
 
     steps:
 
diff --git a/arigram/msg.py b/arigram/msg.py
index 8567e15..c314f22 100644
--- a/arigram/msg.py
+++ b/arigram/msg.py
@@ -64,7 +64,10 @@ class MsgProxy:
         self.msg[key] = value
 
     def get(self, key: str) -> Any:
-        return self[key]
+        try:
+            return self[key]
+        except KeyError:
+            return None
 
     @property
     def type(self) -> Optional[str]: