diff --git a/Dockerfile b/Dockerfile
index eccb237..379e34c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:2.7.18
+FROM python:3.9
 
 EXPOSE 5000
 
@@ -14,4 +14,4 @@ RUN pip install -r requirements.txt
 
 ADD . /app/
 
-CMD ["python", "app.py"]
\ No newline at end of file
+CMD ["python3", "app.py"]
\ No newline at end of file
diff --git a/Procfile b/Procfile
index 2e35818..ab678e0 100644
--- a/Procfile
+++ b/Procfile
@@ -1 +1 @@
-web: python app.py
+web: python3 app.py
\ No newline at end of file
diff --git a/README.md b/README.md
index 756bb1e..04d09f2 100644
--- a/README.md
+++ b/README.md
@@ -11,10 +11,10 @@ However, it is still functional with the `scalingo-18` stack.
 ## Run Locally
 
 ```shell
-virtualenv
-. bin/activate
+python3 -m venv venv
+. venv/bin/activate
 pip install -r requirements.txt
-python app.py
+python3 app.py
 ```
 
 ## Deploy via Git
@@ -32,4 +32,4 @@ The application is running at this URL: https://<name_of_your_app>.osc-fr1.scali
 
 ## Deploy via one-click
 
-[![Deploy to Scalingo](https://cdn.scalingo.com/deploy/button.svg)](https://my.scalingo.com/deploy)
+[![Deploy to Scalingo](https://cdn.scalingo.com/deploy/button.svg)](https://my.scalingo.com/deploy)
\ No newline at end of file
diff --git a/app.py b/app.py
index e4a353f..b416ae7 100644
--- a/app.py
+++ b/app.py
@@ -9,8 +9,8 @@ def hello():
     return render_template('index.html')
 
 if __name__ == "__main__":
-    print "Running app"
+    print("Running app")
     port = int(os.environ.get("PORT", 5000))
-    if port <> 5000:
-        print "Using non-standard port %d" % port
-    app.run(host='0.0.0.0', port=port)
+    if port != 5000:
+        print("Using non-standard port %d" % port)
+    app.run(host='0.0.0.0', port=port)
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 08e279b..25b2134 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
-Click==7.0
-Flask==1.0.2
-itsdangerous==1.1.0
-Jinja2==2.11.3
-MarkupSafe==1.1.1
-Werkzeug==0.15.3
+Click==8.0.1
+Flask==2.0.1
+itsdangerous==2.0.1
+Jinja2==3.0.1
+MarkupSafe==2.0.1
+Werkzeug==2.0.1
\ No newline at end of file
diff --git a/runtime.txt b/runtime.txt
index d42956d..333d904 100644
--- a/runtime.txt
+++ b/runtime.txt
@@ -1 +1 @@
-python-2.7.16
+python-3.10.0
\ No newline at end of file