diff --git a/pyproject.toml b/pyproject.toml
index 2673425..54a98f0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -67,6 +67,9 @@ include = [
     "LICENSE",
 ]
 
+[tool.hatch.build.hooks.vcs]
+version-file = "src/jntajis/_version.py"
+
 [tool.ruff]
 line-length = 99
 target-version = "py310"
diff --git a/src/jntajis/__init__.py b/src/jntajis/__init__.py
index bbf6f6d..089f72a 100644
--- a/src/jntajis/__init__.py
+++ b/src/jntajis/__init__.py
@@ -32,7 +32,7 @@
 import enum
 
 try:
-    from ._jntajis import (  # noqa: F401
+    from ._jntajis import (
         IncrementalEncoder,
         TransliterationError,
         jnta_decode,
@@ -40,10 +40,26 @@
         jnta_shrink_translit,
         mj_shrink_candidates,
     )
+    from ._version import __version__, __version_tuple__
 except ImportError:
     pass
 
 
+__all__ = [
+    "__version__",
+    "__version_tuple__",
+    "IncrementalEncoder",
+    "TransliterationError",
+    "jnta_encode",
+    "jnta_decode",
+    "jnta_shrink_translit",
+    "mj_shrink_candidates",
+    "ConversionMode",
+    "MJShrinkScheme",
+    "MJShrinkSchemeCombo",
+]
+
+
 class ConversionMode(enum.IntEnum):
     SISO = 0
     """
diff --git a/src/jntajis/_jntajis.c b/src/jntajis/_jntajis.c
index 2ef980d..a41bc1b 100644
--- a/src/jntajis/_jntajis.c
+++ b/src/jntajis/_jntajis.c
@@ -9,8 +9,8 @@
             "src/jntajis/pythoncapi_compat_shim.h"
         ],
         "extra_compile_args": [
-            "-I/usr/local/include",
-            "-O2"
+            "-O2",
+            "-I/usr/local/include"
         ],
         "extra_link_args": [
             "-L/usr/local/lib",