diff --git a/playwright/IIIF-Builder-Demo/package-lock.json b/playwright/IIIF-Builder-Demo/package-lock.json
index bbc45c7..57ecd3c 100644
--- a/playwright/IIIF-Builder-Demo/package-lock.json
+++ b/playwright/IIIF-Builder-Demo/package-lock.json
@@ -11,7 +11,7 @@
       "devDependencies": {
         "@playwright/test": "^1.50.1",
         "@types/node": "^22.13.2",
-        "fast-xml-parser": "^4.5.1"
+        "fast-xml-parser": "^5.3.6"
       }
     },
     "node_modules/@playwright/test": {
@@ -39,22 +39,19 @@
       }
     },
     "node_modules/fast-xml-parser": {
-      "version": "4.5.1",
-      "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-4.5.1.tgz",
-      "integrity": "sha512-y655CeyUQ+jj7KBbYMc4FG01V8ZQqjN+gDYGJ50RtfsUB8iG9AmwmwoAgeKLJdmueKKMrH1RJ7yXHTSoczdv5w==",
+      "version": "5.3.6",
+      "resolved": "https://registry.npmjs.org/fast-xml-parser/-/fast-xml-parser-5.3.6.tgz",
+      "integrity": "sha512-QNI3sAvSvaOiaMl8FYU4trnEzCwiRr8XMWgAHzlrWpTSj+QaCSvOf1h82OEP1s4hiAXhnbXSyFWCf4ldZzZRVA==",
       "dev": true,
       "funding": [
         {
           "type": "github",
           "url": "https://github.com/sponsors/NaturalIntelligence"
-        },
-        {
-          "type": "paypal",
-          "url": "https://paypal.me/naturalintelligence"
         }
       ],
+      "license": "MIT",
       "dependencies": {
-        "strnum": "^1.0.5"
+        "strnum": "^2.1.2"
       },
       "bin": {
         "fxparser": "src/cli/cli.js"
@@ -105,10 +102,17 @@
       }
     },
     "node_modules/strnum": {
-      "version": "1.0.5",
-      "resolved": "https://registry.npmjs.org/strnum/-/strnum-1.0.5.tgz",
-      "integrity": "sha512-J8bbNyKKXl5qYcR36TIO8W3mVGVHrmmxsd5PAItGkmyzwJvybiw2IVq5nqd0i4LSNSkB/sx9VHllbfFdr9k1JA==",
-      "dev": true
+      "version": "2.1.2",
+      "resolved": "https://registry.npmjs.org/strnum/-/strnum-2.1.2.tgz",
+      "integrity": "sha512-l63NF9y/cLROq/yqKXSLtcMeeyOfnSQlfMSlzFt/K73oIaD8DGaQWd7Z34X9GPiKqP5rbSh84Hl4bOlLcjiSrQ==",
+      "dev": true,
+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/NaturalIntelligence"
+        }
+      ],
+      "license": "MIT"
     },
     "node_modules/undici-types": {
       "version": "6.20.0",
diff --git a/playwright/IIIF-Builder-Demo/package.json b/playwright/IIIF-Builder-Demo/package.json
index 3295601..a277f51 100644
--- a/playwright/IIIF-Builder-Demo/package.json
+++ b/playwright/IIIF-Builder-Demo/package.json
@@ -10,6 +10,6 @@
   "devDependencies": {
     "@playwright/test": "^1.50.1",
     "@types/node": "^22.13.2",
-    "fast-xml-parser": "^4.5.1"
+    "fast-xml-parser": "^5.3.6"
   }
 }