diff --git a/package-lock.json b/package-lock.json
index e708917b..c615c335 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -11,7 +11,7 @@
       "dependencies": {
         "@menhera/deterministic-json": "^0.1.0",
         "@noble/curves": "^2",
-        "diff": "^8",
+        "diff": "^9",
         "webextension-polyfill": "^0.12.0",
         "weeg-containers": "^0.12.0",
         "weeg-domains": "^0.10.0",
@@ -3938,9 +3938,9 @@
       }
     },
     "node_modules/diff": {
-      "version": "8.0.4",
-      "resolved": "https://registry.npmjs.org/diff/-/diff-8.0.4.tgz",
-      "integrity": "sha512-DPi0FmjiSU5EvQV0++GFDOJ9ASQUVFh5kD+OzOnYdi7n3Wpm9hWWGfB/O2blfHcMVTL5WkQXSnRiK9makhrcnw==",
+      "version": "9.0.0",
+      "resolved": "https://registry.npmjs.org/diff/-/diff-9.0.0.tgz",
+      "integrity": "sha512-svtcdpS8CgJyqAjEQIXdb3OjhFVVYjzGAPO8WGCmRbrml64SPw/jJD4GoE98aR7r25A0XcgrK3F02yw9R/vhQw==",
       "license": "BSD-3-Clause",
       "engines": {
         "node": ">=0.3.1"
diff --git a/package.json b/package.json
index 995a4619..94700be4 100644
--- a/package.json
+++ b/package.json
@@ -38,7 +38,7 @@
   "dependencies": {
     "@menhera/deterministic-json": "^0.1.0",
     "@noble/curves": "^2",
-    "diff": "^8",
+    "diff": "^9",
     "webextension-polyfill": "^0.12.0",
     "weeg-containers": "^0.12.0",
     "weeg-domains": "^0.10.0",