diff --git a/package-lock.json b/package-lock.json
index d2cb1a9..5f0fe00 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "dependencies": {
         "@comapeo/geometry": "^1.1.1",
         "compact-encoding": "^2.12.0",
-        "protobufjs": "^7.2.5",
+        "protobufjs": "^7.5.5",
         "type-fest": "^4.26.0"
       },
       "devDependencies": {
@@ -3882,9 +3882,9 @@
       }
     },
     "node_modules/protobufjs": {
-      "version": "7.4.0",
-      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.4.0.tgz",
-      "integrity": "sha512-mRUWCc3KUU4w1jU8sGxICXH/gNS94DvI1gxqDvBzhj1JpcsimQkYiOJfwsPUykUI5ZaspFbSgmBLER8IrQ3tqw==",
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.5.5.tgz",
+      "integrity": "sha512-3wY1AxV+VBNW8Yypfd1yQY9pXnqTAN+KwQxL8iYm3/BjKYMNg4i0owhEe26PWDOMaIrzeeF98Lqd5NGz4omiIg==",
       "hasInstallScript": true,
       "license": "BSD-3-Clause",
       "dependencies": {
diff --git a/package.json b/package.json
index 0d0c2cf..0d90869 100644
--- a/package.json
+++ b/package.json
@@ -63,7 +63,7 @@
   "dependencies": {
     "@comapeo/geometry": "^1.1.1",
     "compact-encoding": "^2.12.0",
-    "protobufjs": "^7.2.5",
+    "protobufjs": "^7.5.5",
     "type-fest": "^4.26.0"
   },
   "prettier": {