diff --git a/arcade/arcade/core/catalog.py b/arcade/arcade/core/catalog.py
index a9451a4b..496e8284 100644
--- a/arcade/arcade/core/catalog.py
+++ b/arcade/arcade/core/catalog.py
@@ -384,7 +384,7 @@ def create_output_definition(func: Callable) -> ToolOutput:
         )
 
     if hasattr(return_type, "__metadata__"):
-        description = return_type.__metadata__[0] if return_type.__metadata__ else None
+        description = return_type.__metadata__[0] if return_type.__metadata__ else None  # type: ignore[assignment]
         return_type = return_type.__origin__
 
     # Unwrap Optional types
@@ -542,7 +542,7 @@ def get_wire_type_info(_type: type) -> WireTypeInfo:
     # Special case: Enum can be enumerated on the wire
     elif issubclass(type_to_check, Enum):
         is_enum = True
-        enum_values = [e.value for e in type_to_check]
+        enum_values = [e.value for e in type_to_check]  # type: ignore[union-attr]
 
     return WireTypeInfo(wire_type, inner_wire_type, enum_values if is_enum else None)
 
diff --git a/arcade/pyproject.toml b/arcade/pyproject.toml
index 569161ab..0eff8b01 100644
--- a/arcade/pyproject.toml
+++ b/arcade/pyproject.toml
@@ -22,6 +22,8 @@ tomlkit = "^0.12.4"
 openai = "^1.36.0" # TODO: relax to an earlier version that still has what we need
 pyjwt = "^2.8.0"
 loguru = "^0.7.0"
+types-python-dateutil = "2.9.0.20241003"
+types-pytz = "2024.2.0.20241003"
 opentelemetry-instrumentation-fastapi = {version = "0.48b0", optional = true}
 opentelemetry-exporter-otlp-proto-http = {version = "1.27.0", optional = true}
 opentelemetry-exporter-otlp-proto-common = {version = "1.27.0", optional = true}