diff --git a/dbt_common/clients/agate_helper.py b/dbt_common/clients/agate_helper.py
index 614d8815..719d49c7 100644
--- a/dbt_common/clients/agate_helper.py
+++ b/dbt_common/clients/agate_helper.py
@@ -1,6 +1,6 @@
 from codecs import BOM_UTF8
 
-import agate
+import agate  # type: ignore
 import datetime
 import isodate
 import json
diff --git a/dbt_common/events/functions.py b/dbt_common/events/functions.py
index 115d8553..a21fd317 100644
--- a/dbt_common/events/functions.py
+++ b/dbt_common/events/functions.py
@@ -94,7 +94,7 @@ def msg_to_dict(msg: EventMsg) -> dict:
     msg_dict = dict()
     try:
         msg_dict = MessageToDict(
-            msg,
+            msg.data,
             preserving_proto_field_name=True,
             including_default_value_fields=True,  # type: ignore
         )
diff --git a/dbt_common/utils/encoding.py b/dbt_common/utils/encoding.py
index ab19b894..96acb9c8 100644
--- a/dbt_common/utils/encoding.py
+++ b/dbt_common/utils/encoding.py
@@ -9,7 +9,7 @@
 
 DECIMALS: Tuple[Type[Any], ...]
 try:
-    import cdecimal  # typing: ignore
+    import cdecimal  # type: ignore
 except ImportError:
     DECIMALS = (decimal.Decimal,)
 else:
diff --git a/pyproject.toml b/pyproject.toml
index a8c49173..b74190b5 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -70,6 +70,7 @@ dependencies = [
   "pytest~=7.3",
   "types-Jinja2~=2.11",
   "types-jsonschema~=4.17",
+  "types-protobuf~=4.24.0",
   "types-python-dateutil~=2.8",
   "types-PyYAML~=6.0",
   "types-requests<2.31.0" # types-requests 2.31.0.8 requires urllib3>=2, but we pin urllib3 ~= 1.0 because of openssl requirement for requests
diff --git a/third-party-stubs/jinja2/__init__.py b/third-party-stubs/jinja2/__init__.py
deleted file mode 100644
index e69de29b..00000000