diff --git a/lang/python/python-flask-babel/Makefile b/lang/python/python-flask-babel/Makefile
index c23fb47646..2da9ad8557 100644
--- a/lang/python/python-flask-babel/Makefile
+++ b/lang/python/python-flask-babel/Makefile
@@ -8,12 +8,12 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=python-flask-babel
-PKG_VERSION:=3.1.0
+PKG_VERSION:=4.0.0
 PKG_RELEASE:=1
 
 PYPI_NAME:=flask-babel
 PYPI_SOURCE_NAME:=flask_babel
-PKG_HASH:=be015772c5d7f046f3b99c508dcf618636eb93d21b713b356db79f3e79f69f39
+PKG_HASH:=dbeab4027a3f4a87678a11686496e98e1492eb793cbdd77ab50f4e9a2602a593
 
 PKG_MAINTAINER:=Josef Schlehofer <pepe.schlehofer@gmail.com>
 PKG_LICENSE:=BSD-3-Clause
diff --git a/lang/python/python-flask-babel/test.sh b/lang/python/python-flask-babel/test.sh
new file mode 100755
index 0000000000..48877f4327
--- /dev/null
+++ b/lang/python/python-flask-babel/test.sh
@@ -0,0 +1,20 @@
+#!/bin/sh
+
+[ "$1" = python3-flask-babel ] || exit 0
+
+python3 - <<'EOF'
+from flask import Flask
+from flask_babel import Babel, gettext, lazy_gettext
+
+app = Flask(__name__)
+babel = Babel(app)
+
+with app.app_context():
+    result = gettext("Hello")
+    assert isinstance(result, str), "gettext should return a string"
+
+lazy = lazy_gettext("World")
+assert str(lazy) == "World", f"lazy_gettext failed: {lazy!r}"
+
+print("python3-flask-babel OK")
+EOF