diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index ea0152da..d5a4eaa2 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -46,6 +46,7 @@ Bug Fixes
 ::
 
    * Adjust field tests for Python 3.14 (``staticmethod`` around ``functools.partial`` used as a class attribute). [python-restx]
+   * ``Api.init_app(app, version=...)`` now overrides the version supplied to ``Api()`` (#119) [jbbqqf]
 
 .. _section-1.3.1:
 1.3.1
diff --git a/flask_restx/api.py b/flask_restx/api.py
index 4f758714..dd72bc8b 100644
--- a/flask_restx/api.py
+++ b/flask_restx/api.py
@@ -208,6 +208,7 @@ def init_app(self, app, **kwargs):
         >>> api.init_app(app)
 
         :param flask.Flask app: the Flask application object
+        :param str version: The API version (used in Swagger documentation)
         :param str title: The API title (used in Swagger documentation)
         :param str description: The API description (used in Swagger documentation)
         :param str terms_url: The API terms page URL (used in Swagger documentation)
@@ -219,6 +220,9 @@ def init_app(self, app, **kwargs):
             reverse proxy.
         """
         self.app = app
+        # version is set in __init__ but used to be dropped here, leaving the
+        # Swagger info.version stuck on the constructor's default — see #119.
+        self.version = kwargs.get("version", self.version)
         self.title = kwargs.get("title", self.title)
         self.description = kwargs.get("description", self.description)
         self.terms_url = kwargs.get("terms_url", self.terms_url)
diff --git a/tests/test_api.py b/tests/test_api.py
index 2b40b235..7d2ce48b 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -97,6 +97,18 @@ def test_specs_endpoint_not_added(self, app):
         assert "specs" not in api.endpoints
         assert "specs" not in app.view_functions
 
+    def test_init_app_overrides_version(self, app):
+        # init_app() should propagate the version kwarg the same way it
+        # already propagates title/description (see #119). Prior to the
+        # fix, the version supplied to init_app() was silently dropped,
+        # so the Swagger "info.version" kept the constructor's value.
+        api = restx.Api(version="1.0")
+        api.init_app(app, version="2.5")
+        assert api.version == "2.5"
+        with app.test_client() as client:
+            spec = client.get("/swagger.json").get_json()
+            assert spec["info"]["version"] == "2.5"
+
     def test_specs_endpoint_not_found_if_not_added(self, app, client):
         api = restx.Api()
         api.init_app(app, add_specs=False)