diff --git a/docs/conf.py b/docs/conf.py
index 2c8928e..81de350 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -9,7 +9,7 @@
 import re
 import sys
 from pathlib import Path
-import tomllib
+from importlib import metadata
 
 DOCS_DIR = Path(__file__).resolve().parent
 ROOT_DIR = DOCS_DIR.parent
@@ -17,22 +17,11 @@
 sys.path.append(str(ROOT_DIR))
 sys.path.append(str(ROOT_DIR / "src"))
 
-
-def _read_release() -> str:
-    pyproject_file = ROOT_DIR / "pyproject.toml"
-    data = tomllib.loads(pyproject_file.read_text(encoding="utf-8"))
-
-    try:
-        return data["project"]["version"]
-    except KeyError as exc:
-        raise RuntimeError(
-            f"Could not determine khisto version from {pyproject_file}"
-        ) from exc
-
 project = 'khisto-python'
 copyright = '2026, The Khiops Team'
 author = 'The Khiops Team'
-release = _read_release()
+# We want to make sure the docs are built on an installed package only
+release = metadata.version("khisto")
 
 # -- General configuration ---------------------------------------------------
 # https://www.sphinx-doc.org/en/master/usage/configuration.html#general-configuration
diff --git a/pyproject.toml b/pyproject.toml
index fdb47a1..61b6f48 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "khisto"
-version = "0.2.0"
+version = "0.3.0"
 description = "Optimal histogram visualization using the Khiops algorithm"
 readme = "README.md"
 license = "BSD-3-Clause-Clear"
@@ -80,6 +80,7 @@ dev = [
     {include-group = "test"},
     {include-group = "lint"},
     {include-group = "docs"},
+    "tomli>=2.0.0; python_version < '3.11'" # TODO : Remove on Python 3.10 EOL
 ]
 
 [build-system]
diff --git a/src/khisto/__init__.py b/src/khisto/__init__.py
index ed8f3ad..5fd5450 100644
--- a/src/khisto/__init__.py
+++ b/src/khisto/__init__.py
@@ -10,11 +10,24 @@
 logging.basicConfig(level=logging.INFO)
 logger = logging.getLogger(__name__)
 
-ROOT_DIR = Path(os.path.dirname(os.path.abspath(__file__))).parent.absolute()
-
+ROOT_DIR = Path(__file__).resolve().parent.parent
 KHISTO_BIN_DIR = os.environ.get("KHISTO_BIN_DIR", "khisto")
 
-__version__ = version("khisto")
+if (ROOT_DIR / "pyproject.toml").exists():
+    # Development mode: package not installed; pyproject.toml present
+    # TODO : Remove on Python 3.10 EOL
+    try:
+        import tomllib as tomli
+    except ModuleNotFoundError:
+        import tomli
+
+    with open(ROOT_DIR / "pyproject.toml", "rt") as f:
+        __version__ = tomli.load(f)["project"]["version"]
+else:
+    # User mode: package installed; pyproject.toml not directly accessible
+    from importlib.metadata import version  # noqa: E402
+
+    __version__ = version("khisto")
 
 from .array import histogram  # noqa: E402
 from .core import HistogramResult  # noqa: E402