diff --git a/package-lock.json b/package-lock.json
index 524ddd868..c8a78ffa5 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -12,7 +12,7 @@
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         "chainpad-crypto": "^0.2.5",
         "chainpad-server": "^5.1.0",
-        "express": "~4.16.0",
+        "express": "~4.18.2",
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         "get-folder-size": "^2.0.1",
         "netflux-websocket": "^0.1.20",
@@ -316,23 +316,40 @@
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-      "integrity": "sha1-WykhmP/dVTs6DyDe0FkrlWlVyLQ=",
+      "version": "1.20.1",
+      "resolved": "https://registry.npmjs.org/body-parser/-/body-parser-1.20.1.tgz",
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-        "qs": "6.5.2",
-        "raw-body": "2.3.3",
-        "type-is": "~1.6.16"
+        "depd": "2.0.0",
+        "destroy": "1.2.0",
+        "http-errors": "2.0.0",
+        "iconv-lite": "0.4.24",
+        "on-finished": "2.4.1",
+        "qs": "6.11.0",
+        "raw-body": "2.5.1",
+        "type-is": "~1.6.18",
+        "unpipe": "1.0.0"
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+        "node": ">= 0.8",
+        "npm": "1.2.8000 || >= 1.4.16"
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+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
+      "integrity": "sha512-MvjoMCJwEarSbUYk5O+nmoSzSutSsTwF85zcHPQ9OrlFoZOYIjaqBAJIqIXjptyD5vThxGq52Xu/MaJzRkIk4Q==",
+      "dependencies": {
+        "side-channel": "^1.0.4"
+      },
+      "engines": {
+        "node": ">=0.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
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@@ -388,9 +405,9 @@
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-      "integrity": "sha1-0ygVQE1olpn4Wk6k+odV3ROpYEg=",
+      "version": "3.1.2",
+      "resolved": "https://registry.npmjs.org/bytes/-/bytes-3.1.2.tgz",
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@@ -415,6 +432,18 @@
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+    "node_modules/call-bind": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/call-bind/-/call-bind-1.0.2.tgz",
+      "integrity": "sha512-7O+FbCihrB5WGbFYesctwmTKae6rOiIzmz1icreWJ+0aA7LJfuqhEso2T9ncpcFtzMQtzXf2QGGueWJGTYsqrA==",
+      "dependencies": {
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+        "get-intrinsic": "^1.0.2"
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+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
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@@ -645,13 +674,35 @@
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-      "integrity": "sha1-DPaLud318r55YcOoUXjLhdunjLQ=",
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/content-disposition/-/content-disposition-0.5.4.tgz",
+      "integrity": "sha512-FveZTNuGw04cxlAiWbzi6zTAL/lhehaWbTtgluJh4/E95DqMwTmha3KZN1aAWA8cFIhHzMZUvLevkw5Rqk+tSQ==",
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+      },
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       }
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+    "node_modules/content-disposition/node_modules/safe-buffer": {
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+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
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@@ -661,9 +712,9 @@
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-      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.3.1.tgz",
-      "integrity": "sha1-5+Ch+e9DtMi6klxcWpboBtFoc7s=",
+      "version": "0.5.0",
+      "resolved": "https://registry.npmjs.org/cookie/-/cookie-0.5.0.tgz",
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@@ -743,9 +794,9 @@
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-      "integrity": "sha1-6zkTMzRYd1y4TNGh+uBiEGu4dUU=",
+      "version": "0.2.2",
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@@ -775,17 +826,21 @@
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-      "integrity": "sha1-m81S4UwJd2PnSbJ0xDRu0uVgtak=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/depd/-/depd-2.0.0.tgz",
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+        "node": ">= 0.8"
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-      "version": "1.0.4",
-      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.0.4.tgz",
-      "integrity": "sha1-l4hXRCxEdJ5CBmE+N5RiBYJqvYA="
+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/destroy/-/destroy-1.2.0.tgz",
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+        "npm": "1.2.8000 || >= 1.4.16"
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-      "integrity": "sha1-rT/0yG7C0CkyL1oCw6mmBslbP1k=",
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@@ -910,7 +965,7 @@
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@@ -928,7 +983,7 @@
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-      "integrity": "sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=",
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@@ -1065,38 +1120,39 @@
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+      "resolved": "https://registry.npmjs.org/express/-/express-4.18.2.tgz",
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-        "accepts": "~1.3.5",
+        "accepts": "~1.3.8",
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-        "body-parser": "1.18.3",
-        "content-disposition": "0.5.2",
+        "body-parser": "1.20.1",
+        "content-disposition": "0.5.4",
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-        "cookie": "0.3.1",
+        "cookie": "0.5.0",
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         "debug": "2.6.9",
-        "depd": "~1.1.2",
+        "depd": "2.0.0",
         "encodeurl": "~1.0.2",
         "escape-html": "~1.0.3",
         "etag": "~1.8.1",
-        "finalhandler": "1.1.1",
+        "finalhandler": "1.2.0",
         "fresh": "0.5.2",
+        "http-errors": "2.0.0",
         "merge-descriptors": "1.0.1",
         "methods": "~1.1.2",
-        "on-finished": "~2.3.0",
-        "parseurl": "~1.3.2",
+        "on-finished": "2.4.1",
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-        "qs": "6.5.2",
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-        "serve-static": "1.13.2",
-        "setprototypeof": "1.1.0",
-        "statuses": "~1.4.0",
-        "type-is": "~1.6.16",
+        "proxy-addr": "~2.0.7",
+        "qs": "6.11.0",
+        "range-parser": "~1.2.1",
+        "safe-buffer": "5.2.1",
+        "send": "0.18.0",
+        "serve-static": "1.15.0",
+        "setprototypeof": "1.2.0",
+        "statuses": "2.0.1",
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         "vary": "~1.1.2"
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@@ -1104,6 +1160,39 @@
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+    "node_modules/express/node_modules/qs": {
+      "version": "6.11.0",
+      "resolved": "https://registry.npmjs.org/qs/-/qs-6.11.0.tgz",
+      "integrity": "sha512-MvjoMCJwEarSbUYk5O+nmoSzSutSsTwF85zcHPQ9OrlFoZOYIjaqBAJIqIXjptyD5vThxGq52Xu/MaJzRkIk4Q==",
+      "dependencies": {
+        "side-channel": "^1.0.4"
+      },
+      "engines": {
+        "node": ">=0.6"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
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+    "node_modules/express/node_modules/safe-buffer": {
+      "version": "5.2.1",
+      "resolved": "https://registry.npmjs.org/safe-buffer/-/safe-buffer-5.2.1.tgz",
+      "integrity": "sha512-rp3So07KcdmmKbGvgaNxQSJr7bGVSVk5S9Eq1F+ppbRo70+YeaDxkw5Dd8NPN+GD6bjnYm2VuPuCXmpuYvmCXQ==",
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/feross"
+        },
+        {
+          "type": "patreon",
+          "url": "https://www.patreon.com/feross"
+        },
+        {
+          "type": "consulting",
+          "url": "https://feross.org/support"
+        }
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@@ -1254,16 +1343,16 @@
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+      "version": "1.2.0",
+      "resolved": "https://registry.npmjs.org/finalhandler/-/finalhandler-1.2.0.tgz",
+      "integrity": "sha512-5uXcUVftlQMFnWC9qu/svkWv3GTd2PfUhK/3PLkYNAe7FbqJMt3515HaxE6eRL74GdsriiwujiawdaB1BpEISg==",
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-        "parseurl": "~1.3.2",
-        "statuses": "~1.4.0",
+        "on-finished": "2.4.1",
+        "parseurl": "~1.3.3",
+        "statuses": "2.0.1",
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@@ -1334,7 +1423,7 @@
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-      "integrity": "sha1-PYyt2Q2XZWn6g1qx+OSyOhBWBac=",
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@@ -1358,6 +1447,11 @@
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+      "version": "1.1.1",
+      "resolved": "https://registry.npmjs.org/function-bind/-/function-bind-1.1.1.tgz",
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+    },
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@@ -1375,6 +1469,19 @@
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+    "node_modules/get-intrinsic": {
+      "version": "1.1.3",
+      "resolved": "https://registry.npmjs.org/get-intrinsic/-/get-intrinsic-1.1.3.tgz",
+      "integrity": "sha512-QJVz1Tj7MS099PevUG5jvnt9tSkXN8K14dxQlikJuPt4uD9hHAHjLyLBiLR5zELelBdD9QNRAXZzsJx0WaDL9A==",
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+        "has": "^1.0.3",
+        "has-symbols": "^1.0.3"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
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@@ -1503,6 +1610,28 @@
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+      "resolved": "https://registry.npmjs.org/has/-/has-1.0.3.tgz",
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+      },
+      "engines": {
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+      "version": "1.0.3",
+      "resolved": "https://registry.npmjs.org/has-symbols/-/has-symbols-1.0.3.tgz",
+      "integrity": "sha512-l3LCuF6MgDNwTDKkdYGEihYjt5pRPbEg46rtlmnSPlUbgmB8LOIrKJbYYFBSbnPaJexMKtiPO8hmeRjRz2Td+A==",
+      "engines": {
+        "node": ">= 0.4"
+      },
+      "funding": {
+        "url": "https://github.com/sponsors/ljharb"
+      }
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@@ -1556,17 +1685,18 @@
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-      "integrity": "sha1-i1VoC7S+KDoLW/TqLjhYC+HZMg0=",
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/http-errors/-/http-errors-2.0.0.tgz",
+      "integrity": "sha512-FtwrG/euBzaEjYeRqOgly7G0qviiXoJWnvEH2Z1plBdXgbyjv34pHTSb9zoeHMyDy33+DWy5Wt9Wo+TURtOYSQ==",
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-        "statuses": ">= 1.4.0 < 2"
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+        "setprototypeof": "1.2.0",
+        "statuses": "2.0.1",
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@@ -1586,9 +1716,9 @@
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       "resolved": "https://registry.npmjs.org/unpipe/-/unpipe-1.0.0.tgz",
-      "integrity": "sha1-sr9O6FFKrmFltIF4KdIbLvSZBOw="
+      "integrity": "sha512-pjy2bYhSsufwWlKwPc+l3cN7+wuJlK6uz0YdJEOlQDbl6jo/YlPi4mb8agUkVC8BF7V8NuzeyPNqRksA3hztKQ=="
     },
     "unset-value": {
       "version": "1.0.0",
diff --git a/package.json b/package.json
index 8f624fcdd..81d170f94 100644
--- a/package.json
+++ b/package.json
@@ -15,7 +15,7 @@
     "@mcrowe/minibloom": "^0.2.0",
     "chainpad-crypto": "^0.2.5",
     "chainpad-server": "^5.1.0",
-    "express": "~4.16.0",
+    "express": "~4.18.2",
     "fs-extra": "^7.0.0",
     "get-folder-size": "^2.0.1",
     "netflux-websocket": "^0.1.20",
diff --git a/www/common/outer/worker-channel.js b/www/common/outer/worker-channel.js
index a637d0cbe..528488f68 100644
--- a/www/common/outer/worker-channel.js
+++ b/www/common/outer/worker-channel.js
@@ -171,10 +171,12 @@ define([
             var data;
             // apparently some browser extensions send messages to random targets
             // which can trigger parse errors that interrupt normal behaviour
+            // we therefore log a warning and ignore any messages we can't parse
             try {
                 data = typeof(msg.data) === "object" ? msg.data : JSON.parse(msg.data);
             } catch (err) {
-                console.error(err);
+                console.warn(err);
+                return;
             }
             if (typeof(data.ack) !== "undefined") {
                 if (acks[data.txid]) { acks[data.txid](!data.ack); }
diff --git a/www/common/translations/messages.fr.json b/www/common/translations/messages.fr.json
index e6061f938..8b0389add 100644
--- a/www/common/translations/messages.fr.json
+++ b/www/common/translations/messages.fr.json
@@ -1571,8 +1571,10 @@
     "form_answer_new": "Soumettre de nouveau",
     "form_deleteAll": "Tout supprimer",
     "form_responseNotification": "Nouvelles réponses au formulaire : <b>{0}</b>",
-    "form_alreadyAnsweredMult": "Vous avez répondu à ce formulaire sur :",
-    "form_exportJSON": "Exporter au format JSON",
-    "team_inviteUses": "Nombre d'utilisations autorisées pour ce lien (0 = sans limite)",
-    "team_inviteRole": "Rôle initial"
+    "form_alreadyAnsweredMult": "Réponses précédentes à ce formulaire :",
+    "form_exportJSON": "Exporter en JSON",
+    "team_inviteUses": "Utilisations autorisées pour ce lien (0 = sans limite)",
+    "team_inviteRole": "Rôle initial",
+    "team_linkUses": "({0}/{1} restant)",
+    "team_linkUsesInfinite": "(usages illimités)"
 }