diff --git a/demo/package-lock.json b/demo/package-lock.json
index 1eb1e0a..757c335 100644
--- a/demo/package-lock.json
+++ b/demo/package-lock.json
@@ -11,7 +11,7 @@
         "dexie": "4.4.2",
         "mapserver-wasm": "file:../",
         "ol": "10.8.0",
-        "proj4": "2.20.4"
+        "proj4": "2.20.6"
       },
       "devDependencies": {
         "vite": "8.0.3"
@@ -876,13 +876,13 @@
       }
     },
     "node_modules/proj4": {
-      "version": "2.20.4",
-      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.20.4.tgz",
-      "integrity": "sha512-/EEBoXjBw+zW1Lofinw0YFQ4OFOqC6XThnwRAgjEHw8WBN+wSy/6aeqRRdjy4b2igy3X0k3RNDuwcYqcQq7nDw==",
+      "version": "2.20.6",
+      "resolved": "https://registry.npmjs.org/proj4/-/proj4-2.20.6.tgz",
+      "integrity": "sha512-w6d8YDpF3cRQP0O93hft7a0aMpadDLtP461h6FC0hJByI/KLbm1mRcsn6XDPymgB4owottJCwWM/RInHp6dYbA==",
       "license": "MIT",
       "dependencies": {
         "mgrs": "1.0.0",
-        "wkt-parser": "^1.5.3"
+        "wkt-parser": "^1.5.5"
       },
       "funding": {
         "url": "https://github.com/sponsors/ahocevar"
@@ -1108,10 +1108,13 @@
       "license": "Apache-2.0"
     },
     "node_modules/wkt-parser": {
-      "version": "1.5.4",
-      "resolved": "https://registry.npmjs.org/wkt-parser/-/wkt-parser-1.5.4.tgz",
-      "integrity": "sha512-heRp3QBynj8SAGepAkE8h2k4KhUGRqzgwlSRgqNhxjmSIeSvE5ZrV8n1uy5jk+iJO2jmfffIwjdAaTirBOOx0A==",
-      "license": "MIT"
+      "version": "1.5.5",
+      "resolved": "https://registry.npmjs.org/wkt-parser/-/wkt-parser-1.5.5.tgz",
+      "integrity": "sha512-/zMYi94/7D7fxcOSlVmWn6vnOMj3Gq5d1xvVjaYOS9n6h0qOJ4I7YYVxBWYcH1vq9+suhqzXkn05Yx47zQNUIA==",
+      "license": "MIT",
+      "funding": {
+        "url": "https://github.com/sponsors/ahocevar"
+      }
     },
     "node_modules/xml-utils": {
       "version": "1.10.2",
diff --git a/demo/package.json b/demo/package.json
index bad221a..899ec88 100644
--- a/demo/package.json
+++ b/demo/package.json
@@ -11,7 +11,7 @@
     "dexie": "4.4.2",
     "mapserver-wasm": "file:../",
     "ol": "10.8.0",
-    "proj4": "2.20.4"
+    "proj4": "2.20.6"
   },
   "devDependencies": {
     "vite": "8.0.3"