diff --git a/setup.py b/setup.py
index 9af5df5..ebca5e3 100644
--- a/setup.py
+++ b/setup.py
@@ -1,12 +1,21 @@
 from setuptools import setup, find_packages
+import re
 
 # Read the contents of the README file
 with open('README.md', 'r') as f:
     long_description = f.read()
 
+
+def find_version():
+    with open('sqlite2rest/__init__.py', 'r') as f:
+        version_match = re.search(r"^__version__ = ['\"]([^'\"]*)['\"]", f.read(), re.M)
+        if version_match:
+            return version_match.group(1)
+        raise RuntimeError("Unable to find version string.")
+
 setup(
     name='sqlite2rest',
-    version='1.3.0',
+    version=find_version(),
     description='A Python library for creating a RESTful API from an SQLite database using Flask.',
     author='Denis Laprise',
     author_email='git@2ni.net',
diff --git a/sqlite2rest/__init__.py b/sqlite2rest/__init__.py
index aa29884..97aaf81 100644
--- a/sqlite2rest/__init__.py
+++ b/sqlite2rest/__init__.py
@@ -1,2 +1,3 @@
+__version__ = "0.4.0"
 from .app import create_app
 from .database import Database
diff --git a/sqlite2rest/openapi.py b/sqlite2rest/openapi.py
index 6788398..eeb866d 100644
--- a/sqlite2rest/openapi.py
+++ b/sqlite2rest/openapi.py
@@ -1,6 +1,7 @@
 from flask import current_app
 from openapi_spec_validator import validate_spec
 import yaml
+from . import __version__
 
 def get_operation_summary(method):
     return {
@@ -90,7 +91,7 @@ def generate_openapi_spec(db):
         "openapi": "3.0.0",
         "info": {
             "title": "SQLite2REST",
-            "version": "1.0.0"
+            "version": __version__
         },
         "paths": {}
     }