diff --git a/Dockerfile b/Dockerfile
index 39f74fd..c5615b1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -11,10 +11,14 @@ FROM ghcr.io/cirruslabs/flutter:3.44.0 AS build
 #   docker build --build-arg API_BASE_URL=https://api.mymuseum.be -t ... .
 ARG API_BASE_URL=http://localhost:5000
 
+# Empreinte du commit, affichee sur l'ecran de login (voir kGitSha).
+#   docker build --build-arg GIT_SHA=$(git rev-parse --short HEAD) ...
+ARG GIT_SHA=dev
+
 WORKDIR /app
 COPY . .
 RUN flutter pub get
-RUN flutter build web --release --dart-define=API_BASE_URL=$API_BASE_URL
+RUN flutter build web --release --dart-define=API_BASE_URL=$API_BASE_URL --dart-define=GIT_SHA=$GIT_SHA
 
 FROM nginx:1.27-alpine
 COPY nginx.conf /etc/nginx/conf.d/default.conf
diff --git a/lib/Screens/login_screen.dart b/lib/Screens/login_screen.dart
index d11215d..ad39466 100644
--- a/lib/Screens/login_screen.dart
+++ b/lib/Screens/login_screen.dart
@@ -42,6 +42,7 @@ class _LoginScreenState extends State<LoginScreen> {
   String? instanceId;
   String? pinCode;
   Storage localStorage = window.localStorage;
+  late final Future<String> appVersion = getAppVersion();
 
   void authenticateTRY(AppContext appContext, bool fromClick) async {
     clientAPI = Client(this.host!);
@@ -290,7 +291,7 @@ class _LoginScreenState extends State<LoginScreen> {
                           textAlign: TextAlign.center,
                         ),
                         FutureBuilder(
-                          future: getAppVersion(),
+                          future: appVersion,
                           builder: (context, AsyncSnapshot<String> snapshot) {
                             if (snapshot.connectionState == ConnectionState.done &&
                                 snapshot.data != null) {
@@ -389,6 +390,6 @@ class _LoginScreenState extends State<LoginScreen> {
 
   Future<String> getAppVersion() async {
     PackageInfo packageInfo = await PackageInfo.fromPlatform();
-    return packageInfo.version;
+    return 'v${packageInfo.version} \u00b7 $kGitSha';
   }
 }
diff --git a/lib/constants.dart b/lib/constants.dart
index 20dfcb8..dc4bc38 100644
--- a/lib/constants.dart
+++ b/lib/constants.dart
@@ -23,6 +23,13 @@ const kSuccess = Color(0xFF8bc34a);
 const kApiBaseUrl = String.fromEnvironment('API_BASE_URL',
     defaultValue: 'http://localhost:5000');
 
+// Empreinte du build, injectee elle aussi au build :
+//   --dart-define=GIT_SHA=$(git rev-parse --short HEAD)
+// Elle est affichee sous le titre de l'ecran de login et sert a relier un
+// bundle deploye au commit exact qui l'a produit : le numero de version du
+// pubspec ne suffisait pas, il ne bougeait pas d'un deploiement a l'autre.
+const kGitSha = String.fromEnvironment('GIT_SHA', defaultValue: 'dev');
+
 // Responsive
 const kBreakpointMobile = 850.0;
 
diff --git a/pubspec.yaml b/pubspec.yaml
index 0d4c32d..a044ba8 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -15,7 +15,7 @@ publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 # In iOS, build-name is used as CFBundleShortVersionString while build-number used as CFBundleVersion.
 # Read more about iOS versioning at
 # https://developer.apple.com/library/archive/documentation/General/Reference/InfoPlistKeyReference/Articles/CoreFoundationKeys.html
-version: 3.0.0+10
+version: 3.1.3+11
 
 environment:
   sdk: ">=3.1.0 <4.0.0"
diff --git a/web/index.html b/web/index.html
index b36c14f..f57bb26 100644
--- a/web/index.html
+++ b/web/index.html
@@ -14,6 +14,7 @@
   <base href="/">
 
   <meta charset="UTF-8">
+  <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no, viewport-fit=cover">
   <meta content="IE=Edge" http-equiv="X-UA-Compatible">
   <meta name="description" content="A new Flutter application.">
 
@@ -112,9 +113,6 @@
       loadMainDartJs();
     }
   </script>
-  <script type="text/javascript">
-      window.flutterWebRenderer = "html";
-  </script>
   <script type="module">
     // Import the functions you need from the SDKs you need
     import { initializeApp } from "https://www.gstatic.com/firebasejs/10.7.1/firebase-app.js";