diff --git a/CHANGELOG.md b/CHANGELOG.md
index bddafd4..dfffb26 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## 3.0.6 (2025-07-18)
+
+### Changed
+
+- Fixed missing `base_config.json` in released .whl 
+
 ## 3.0.5 (2025-06-18)
 
 ### Changed
diff --git a/base_config.json b/deduce/base_config.json
similarity index 100%
rename from base_config.json
rename to deduce/base_config.json
diff --git a/deduce/deduce.py b/deduce/deduce.py
index 84c6229..613aa89 100644
--- a/deduce/deduce.py
+++ b/deduce/deduce.py
@@ -4,7 +4,6 @@
 import itertools
 import json
 import logging
-import os
 import sys
 from pathlib import Path
 from typing import Any, Optional, Union
@@ -27,8 +26,8 @@
 __version__ = importlib.metadata.version(__package__ or __name__)
 
 
-_BASE_PATH = Path(os.path.dirname(__file__)).parent
-_LOOKUP_LIST_PATH = _BASE_PATH / "deduce" / "data" / "lookup"
+_BASE_PATH = Path(__file__).parent
+_LOOKUP_LIST_PATH = _BASE_PATH / "data" / "lookup"
 _BASE_CONFIG_FILE = _BASE_PATH / "base_config.json"
 
 
diff --git a/pyproject.toml b/pyproject.toml
index ff2cd27..3f22f85 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "deduce"
-version = "3.0.5"
+version = "3.0.6"
 description = "Deduce: de-identification method for Dutch medical text"
 authors = ["Vincent Menger <vmenger@protonmail.com>"]
 maintainers = ["Vincent Menger <vmenger@protonmail.com>"]