diff --git a/EnvelopeGenerator.Web/appsettings.json b/EnvelopeGenerator.Web/appsettings.json
index cd250566..3c28af71 100644
--- a/EnvelopeGenerator.Web/appsettings.json
+++ b/EnvelopeGenerator.Web/appsettings.json
@@ -16,7 +16,7 @@
   },
   "AdminPassword": "dd",
   "PSPDFKitLicenseKey": "SXCtGGY9XA-31OGUXQK-r7c6AkdLGPm2ljuyDr1qu0kkhLvydg-Do-fxpNUF4Rq3fS_xAnZRNFRHbXpE6sQ2BMcCSVTcXVJO6tPviexjpiT-HnrDEySlUERJnnvh-tmeOWprxS6BySPnSILkmaVQtUfOIUS-cUbvvEYHTvQBKbSF8di4XHQFyfv49ihr51axm3NVV3AXwh2EiKL5C5XdqBZ4sQ4O7vXBjM2zvxdPxlxdcNYmiU83uAzw7B83O_jubPzya4CdUHh_YH7Nlp2gP56MeG1Sw2JhMtfG3Rj14Sg4ctaeL9p6AEWca5dDjJ2li5tFIV2fQSsw6A_cowLu0gtMm5i8IfJXeIcQbMC2-0wGv1oe9hZYJvFMdzhTM_FiejM0agemxt3lJyzuyP8zbBSOgp7Si6A85krLWPZptyZBTG7pp7IHboUHfPMxCXqi-zMsqewOJtQBE2mjntU-lPryKnssOpMPfswwQX7QSkJYV5EMqNmEhQX6mEkp2wcqFzMC7bJQew1aO4pOpvChUaMvb1vgRek0HxLag0nwQYX2YrYGh7F_xXJs-8HNwJe8H0-eW4x4faayCgM5rB5772CCCsD9ThZcvXFrjNHHLGJ8WuBUFm6LArvSfFQdii_7j-_sqHMpeKZt26NFgivj1A==",
-  "UseCSPInDev": false,
+  "UseCSPInDev": true,
   "Content-Security-Policy": [ // The first format parameter {0} will be replaced by the nonce value.
     "default-src 'self'",
     "script-src 'self' 'nonce-{0}' 'unsafe-inline' 'unsafe-eval' blob: data:",
@@ -26,8 +26,7 @@
     "connect-src 'self' https://nominatim.openstreetmap.org:* http://localhost:* https://localhost:* ws://localhost:* wss://localhost:* blob:",
     "frame-src 'self'",
     "media-src 'self'",
-    "object-src 'self'",
-    "worker-src 'self' blob: data:"
+    "object-src 'self'"
   ],
   "AllowedOrigins": [ "https://localhost:7202", "https://digitale.unterschrift.wisag.de/" ],
   "NLog": {
diff --git a/EnvelopeGenerator.Web/wwwroot/js/ui.js b/EnvelopeGenerator.Web/wwwroot/js/ui.js
index df299e83..580c40c1 100644
--- a/EnvelopeGenerator.Web/wwwroot/js/ui.js
+++ b/EnvelopeGenerator.Web/wwwroot/js/ui.js
@@ -17,6 +17,7 @@
   static Instance
   static loadPSPDFKit(arrayBuffer, container, licenseKey, locale) {
     UI.Instance = PSPDFKit.load({
+      inlineWorkers: false,
       locale: locale,
       licenseKey: licenseKey,
       styleSheets: ['/css/site.css'],
diff --git a/EnvelopeGenerator.Web/wwwroot/js/ui.min.js b/EnvelopeGenerator.Web/wwwroot/js/ui.min.js
index d428fe8e..dd1e239d 100644
--- a/EnvelopeGenerator.Web/wwwroot/js/ui.min.js
+++ b/EnvelopeGenerator.Web/wwwroot/js/ui.min.js
@@ -1,5 +1,5 @@
 class UI{static allowedToolbarItems=["sidebar-thumbnails","sidebar-document-ouline","sidebar-bookmarks","pager","pan","zoom-out","zoom-in","zoom-mode","spacer","search",];static Instance
-  static loadPSPDFKit(n,t,i,r){return UI.Instance=PSPDFKit.load({locale:r,licenseKey:i,styleSheets:["/css/site.css"],container:t,document:n,annotationPresets:UI.getPresets(),electronicSignatures:{creationModes:["DRAW","TYPE","IMAGE"]},initialViewState:new PSPDFKit.ViewState({sidebarMode:PSPDFKit.SidebarMode.THUMBNAILS}),isEditableAnnotation:function(n){return n.isSignature||n.description=="FRAME"?!1:!0},customRenderers:{Annotation:UI.annotationRenderer}}),UI.Instance}static configurePSPDFKit(n,t){const i=UI.getToolbarItems(n,t);n.setToolbarItems(i)}static annotationRenderer(){return null}static getToolbarItems(n,t){const i=UI.getCustomItems(t),r=UI.getDefaultItems(n.toolbarItems);return r.concat(i)}static createElementFromHTML(n){const t=document.createElement("div");return t.innerHTML=n.trim(),t.firstChild}static getCustomItems=function(n){return[];return[{type:"custom",id:"button-reset",className:"button-reset",title:"Zurücksetzen",onPress(){n("RESET")},icon:`<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
+  static loadPSPDFKit(n,t,i,r){return UI.Instance=PSPDFKit.load({inlineWorkers:!1,locale:r,licenseKey:i,styleSheets:["/css/site.css"],container:t,document:n,annotationPresets:UI.getPresets(),electronicSignatures:{creationModes:["DRAW","TYPE","IMAGE"]},initialViewState:new PSPDFKit.ViewState({sidebarMode:PSPDFKit.SidebarMode.THUMBNAILS}),isEditableAnnotation:function(n){return n.isSignature||n.description=="FRAME"?!1:!0},customRenderers:{Annotation:UI.annotationRenderer}}),UI.Instance}static configurePSPDFKit(n,t){const i=UI.getToolbarItems(n,t);n.setToolbarItems(i)}static annotationRenderer(){return null}static getToolbarItems(n,t){const i=UI.getCustomItems(t),r=UI.getDefaultItems(n.toolbarItems);return r.concat(i)}static createElementFromHTML(n){const t=document.createElement("div");return t.innerHTML=n.trim(),t.firstChild}static getCustomItems=function(n){return[];return[{type:"custom",id:"button-reset",className:"button-reset",title:"Zurücksetzen",onPress(){n("RESET")},icon:`<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor" class="bi bi-arrow-counterclockwise" viewBox="0 0 16 16">
                         <path fill-rule="evenodd" d="M8 3a5 5 0 1 1-4.546 2.914.5.5 0 0 0-.908-.417A6 6 0 1 0 8 2v1z"/>
                         <path d="M8 4.466V.534a.25.25 0 0 0-.41-.192L5.23 2.308a.25.25 0 0 0 0 .384l2.36 1.966A.25.25 0 0 0 8 4.466z"/>
                       </svg>`},{type:"custom",id:"button-reject",className:"button-reject",title:"Ablehnen",onPress(){n("REJECT")},icon:`<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" fill="currentColor" class="bi bi-hand-thumbs-down" viewBox="0 0 16 16">