diff --git a/README.md b/README.md
index b06aae0..c949c57 100644
--- a/README.md
+++ b/README.md
@@ -44,5 +44,5 @@ setup_requires =
 requires = ["setuptools", "setuptools-protobuf"]
 
 [tool.setuptools-protobuf]
-protobufs = example/foo.proto
+protobufs = ["example/foo.proto"]
 ```
diff --git a/setuptools_protobuf/__init__.py b/setuptools_protobuf/__init__.py
index 4267144..2756823 100644
--- a/setuptools_protobuf/__init__.py
+++ b/setuptools_protobuf/__init__.py
@@ -57,7 +57,9 @@ def run(self):
             self.outfiles.extend(protobuf.outputs())
 
     def get_inputs(self):
-        return [protobuf.path for protobuf in self.distribution.protobufs]
+        return [
+            protobuf.path
+            for protobuf in self.distribution.protobufs]  # type: ignore
 
     def get_outputs(self):
         return self.outfiles
@@ -87,7 +89,8 @@ def pyprojecttoml_config(dist: Distribution) -> None:
         return None
 
     if cfg:
-        dist.protobufs = [Protobuf(pb) for pb in cfg.get("protobufs")]
+        dist.protobufs = [  # type: ignore
+            Protobuf(pb) for pb in cfg.get("protobufs")]
 
 
 class Protobuf: