diff --git a/Makefile b/Makefile
index acf80a0..9ec4554 100644
--- a/Makefile
+++ b/Makefile
@@ -6,13 +6,13 @@ help:               ## - Show this help.
 # Dev workflow tasks
 
 generate:           ## - Generate test cases (do this once before running test)
-	poetry run ./tests/generate.py
+	poetry run python -m tests.generate
 
 test:               ## - Run tests
 	poetry run pytest --cov betterproto
 
 types:              ## - Check types with mypy
-	poetry run mypy betterproto --ignore-missing-imports
+	poetry run mypy src/betterproto --ignore-missing-imports
 
 format:             ## - Apply black formatting to source code
 	poetry run black . --exclude tests/output_
diff --git a/pyproject.toml b/pyproject.toml
index 6b6a116..400a797 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -7,8 +7,9 @@ readme = "README.md"
 repository = "https://github.com/danielgtaylor/python-betterproto"
 keywords = ["protobuf", "gRPC"]
 license = "MIT"
-
-exclude = ["betterproto/tests"]
+packages = [
+    { include = "betterproto", from = "src" }
+]
 
 [tool.poetry.dependencies]
 python = "^3.6"
diff --git a/betterproto/__init__.py b/src/betterproto/__init__.py
similarity index 100%
rename from betterproto/__init__.py
rename to src/betterproto/__init__.py
diff --git a/betterproto/_types.py b/src/betterproto/_types.py
similarity index 100%
rename from betterproto/_types.py
rename to src/betterproto/_types.py
diff --git a/betterproto/casing.py b/src/betterproto/casing.py
similarity index 100%
rename from betterproto/casing.py
rename to src/betterproto/casing.py
diff --git a/betterproto/compile/__init__.py b/src/betterproto/compile/__init__.py
similarity index 100%
rename from betterproto/compile/__init__.py
rename to src/betterproto/compile/__init__.py
diff --git a/betterproto/compile/importing.py b/src/betterproto/compile/importing.py
similarity index 100%
rename from betterproto/compile/importing.py
rename to src/betterproto/compile/importing.py
diff --git a/betterproto/compile/naming.py b/src/betterproto/compile/naming.py
similarity index 100%
rename from betterproto/compile/naming.py
rename to src/betterproto/compile/naming.py
diff --git a/betterproto/grpc/__init__.py b/src/betterproto/grpc/__init__.py
similarity index 100%
rename from betterproto/grpc/__init__.py
rename to src/betterproto/grpc/__init__.py
diff --git a/betterproto/grpc/grpclib_client.py b/src/betterproto/grpc/grpclib_client.py
similarity index 100%
rename from betterproto/grpc/grpclib_client.py
rename to src/betterproto/grpc/grpclib_client.py
diff --git a/betterproto/grpc/util/__init__.py b/src/betterproto/grpc/util/__init__.py
similarity index 100%
rename from betterproto/grpc/util/__init__.py
rename to src/betterproto/grpc/util/__init__.py
diff --git a/betterproto/grpc/util/async_channel.py b/src/betterproto/grpc/util/async_channel.py
similarity index 100%
rename from betterproto/grpc/util/async_channel.py
rename to src/betterproto/grpc/util/async_channel.py
diff --git a/betterproto/lib/__init__.py b/src/betterproto/lib/__init__.py
similarity index 100%
rename from betterproto/lib/__init__.py
rename to src/betterproto/lib/__init__.py
diff --git a/betterproto/lib/google/__init__.py b/src/betterproto/lib/google/__init__.py
similarity index 100%
rename from betterproto/lib/google/__init__.py
rename to src/betterproto/lib/google/__init__.py
diff --git a/betterproto/lib/google/protobuf/__init__.py b/src/betterproto/lib/google/protobuf/__init__.py
similarity index 100%
rename from betterproto/lib/google/protobuf/__init__.py
rename to src/betterproto/lib/google/protobuf/__init__.py
diff --git a/betterproto/plugin.bat b/src/betterproto/plugin.bat
similarity index 100%
rename from betterproto/plugin.bat
rename to src/betterproto/plugin.bat
diff --git a/betterproto/plugin.py b/src/betterproto/plugin.py
similarity index 100%
rename from betterproto/plugin.py
rename to src/betterproto/plugin.py
diff --git a/betterproto/py.typed b/src/betterproto/py.typed
similarity index 100%
rename from betterproto/py.typed
rename to src/betterproto/py.typed
diff --git a/betterproto/templates/template.py.j2 b/src/betterproto/templates/template.py.j2
similarity index 100%
rename from betterproto/templates/template.py.j2
rename to src/betterproto/templates/template.py.j2