diff --git a/assets/js/crisp.js b/assets/js/crisp.js
new file mode 100644
index 00000000..79fcb4c2
--- /dev/null
+++ b/assets/js/crisp.js
@@ -0,0 +1,9 @@
+window.$crisp = [];
+window.CRISP_WEBSITE_ID = "d1d5816e-314a-45e4-9715-144347b1039a";
+(function () {
+    d = document;
+    s = d.createElement("script");
+    s.src = "https://client.crisp.chat/l.js";
+    s.async = 1;
+    d.getElementsByTagName("head")[0].appendChild(s);
+})();
diff --git a/src/index.ts b/src/index.ts
index f747b9bd..b39874cd 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -78,11 +78,39 @@ if (!DISABLE_SECURITY_RESPONSE_HEADERS) {
     const cspConfig = {
       directives: {
         defaultSrc: ["'self'"],
-        imgSrc: ["'self'", "data:", "stats.data.gouv.fr"],
-        connectSrc: ["'self'", "stats.data.gouv.fr"],
-        scriptSrc: ["'self'", "stats.data.gouv.fr"],
-        styleSrc: ["'self'"],
-        fontSrc: ["'self'", "data:"],
+        imgSrc: [
+          "'self'",
+          "data:",
+          "stats.data.gouv.fr",
+          "client.crisp.chat",
+          "image.crisp.chat",
+          "storage.crisp.chat",
+        ],
+        connectSrc: [
+          "'self'",
+          "stats.data.gouv.fr",
+          "wss://client.relay.crisp.chat",
+          "client.crisp.chat",
+          "storage.crisp.chat",
+          "wss://stream.relay.crisp.chat",
+        ],
+        scriptSrc: [
+          "'self'",
+          "stats.data.gouv.fr",
+          "settings.crisp.chat",
+          "blob:",
+        ],
+        styleSrc: ["'self'", "client.crisp.chat", "'unsafe-inline'"],
+        fontSrc: ["'self'", "data:", "client.crisp.chat"],
+        mediaSrc: ["'self'", "client.crisp.chat"],
+        frameSrc: ["'self'", "game.crisp.chat"],
+
+        scriptSrcElem: [
+          "'self'",
+          "client.crisp.chat",
+          "'sha256-RtdC0WqE+hX0MgZZk4QgMbkV1woYKbsuKQKKnWxsudI='",
+        ],
+        workerSrc: ["'self'", "blob:"],
         // As for https://github.com/w3c/webappsec-csp/issues/8, the feature is debated
         // and seems not useful for open id provider redirection.
         // We bypass this security for now.
diff --git a/src/views/partials/head.ejs b/src/views/partials/head.ejs
index d21e2af0..4be27208 100644
--- a/src/views/partials/head.ejs
+++ b/src/views/partials/head.ejs
@@ -27,6 +27,8 @@
     <script type="module" src="<%= js('app.js') %>"></script>
     <!-- Matomo -->
     <script type="module" src="<%= js('matomo.js') %>"></script>
+    <!-- Crisp -->
+    <script type="module" src="<%= js('crisp.js') %>"></script>
     <noscript><p><img src="https://stats.data.gouv.fr/matomo.php?idsite=85&amp;rec=1" style="border:0;" alt="" /></p></noscript>
     <!-- End Matomo Code -->
 </head>