diff --git a/MANIFEST.in b/MANIFEST.in
index 9e35d42..320214c 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,7 +1,7 @@
 include src/*.h
 include src/*.c
-include src/*.pyx
-include src/*.py
+include src/lintegrate/*.pyx
+include src/lintegrate/*.py
 include LICENSE
 include gsl-config.bat
 include pyproject.toml
diff --git a/pyproject.toml b/pyproject.toml
index 7fd0a49..a373c86 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,14 +46,13 @@ docs = [
     "sphinxext-remoteliteralinclude",
 ]
 
-[tools.setuptools.packages.find]
-include = [
-    "lintegrate*",
-]
+[tool.setuptools.packages.find]
+where = ["src"]
+include = ["lintegrate*"]
 
-[tools.setuptools.package-data]
+[tool.setuptools.package-data]
 lintegrate = ["*.pyx"]
 
-[tools.setuptools_scm]
-write_to = "src/_version.py"
+[tool.setuptools_scm]
+write_to = "src/lintegrate/_version.py"
 
diff --git a/setup.py b/setup.py
index 9fdd864..133dcea 100644
--- a/setup.py
+++ b/setup.py
@@ -59,9 +59,9 @@ def gsl_config(*args, **kwargs):
 
 ext_modules = [
     Extension(
-        "lintegrate",
+        "lintegrate.lintegrate",
         sources=[
-            "src/lintegrate.pyx",
+            "src/lintegrate/lintegrate.pyx",
             "src/lintegrate_qag.c",
             "src/lintegrate_qng.c",
             "src/lintegrate_cquad.c",
diff --git a/src/__init__.py b/src/lintegrate/__init__.py
similarity index 100%
rename from src/__init__.py
rename to src/lintegrate/__init__.py
diff --git a/src/lintegrate.pyx b/src/lintegrate/lintegrate.pyx
similarity index 100%
rename from src/lintegrate.pyx
rename to src/lintegrate/lintegrate.pyx