diff --git a/assets/scss/base/_base.scss b/assets/scss/base/_base.scss
index 0f9f8b220d..4ac580218e 100644
--- a/assets/scss/base/_base.scss
+++ b/assets/scss/base/_base.scss
@@ -94,9 +94,9 @@ textarea {
     resize: vertical;
 }
 
-.chromeframe {
+.old-browser-warning {
     margin: 0;
-    background: #ccc;
+    background: #ddd;
     color: #000;
     padding: 0.2em 0;
     text-align: center;
@@ -105,6 +105,11 @@ textarea {
     width: 100%;
 }
 
+body.old-browser-warning-shown .page-container {
+    position: relative;
+    top: 3rem;
+}
+
 .a11y {
     display: block;
     width: 0;
diff --git a/templates/base.html b/templates/base.html
index d2b0db1aee..0a7db6d0bd 100644
--- a/templates/base.html
+++ b/templates/base.html
@@ -140,9 +140,8 @@
         data-show-markdown-help="false"
     {% endif %}
 >
-    <!--[if lt IE 9]>
-        <p class="chromeframe">Vous utilisez un navigateur <strong>dépassé</strong>. Merci de <a href="http://browsehappy.com/">mettre à jour celui-ci</a> pour améliorer votre expérience.</p>
-    <![endif]-->
+
+    {% include "old_browser_warning.html" %}
 
     <div class="mobile-menu" id="mobile-menu"></div>
 
diff --git a/templates/old_browser_warning.html b/templates/old_browser_warning.html
new file mode 100644
index 0000000000..cb89926f10
--- /dev/null
+++ b/templates/old_browser_warning.html
@@ -0,0 +1,27 @@
+
+<div id="old-browser-warning-container"></div>
+
+{# The main JavaScript files may cause parse errors on old browsers in the    #}
+{# future (ES6, ES7, …). It is probably better to keep this script separated. #}
+
+<script>
+
+(function () {
+    var container = document.getElementById("old-browser-warning-container");
+
+    if (window.ActiveXObject || 'ActiveXObject' in window) {
+        var more = document.createElement('A');
+        more.innerText = 'En savoir plus';
+        more.setAttribute('href', 'https://browsehappy.com/?locale=fr');
+
+        var div = document.createElement('DIV');
+        div.className = 'old-browser-warning';
+        div.innerText = 'Le bon fonctionnement du site avec Internet Explorer n’est pas garanti  •  ';
+        div.appendChild(more);
+        container.appendChild(div);
+
+        document.body.classList.add('old-browser-warning-shown');
+    }
+})();
+
+</script>