diff --git a/client/package.json b/client/package.json
index 1fc4b20d..663f5cd7 100644
--- a/client/package.json
+++ b/client/package.json
@@ -31,7 +31,7 @@
     "@opengsn/common": "^2.2.5"
   },
   "devDependencies": {
-    "rollup": "^0.64.0",
+    "rollup": "^3.29.5",
     "tslint": "^5.11.0",
     "typescript": "^5.5.4"
   }
diff --git a/client/rollup.config.js b/client/rollup.config.mjs
similarity index 100%
rename from client/rollup.config.js
rename to client/rollup.config.mjs
diff --git a/client/yarn.lock b/client/yarn.lock
index da6ab7e4..bd0c9de9 100644
--- a/client/yarn.lock
+++ b/client/yarn.lock
@@ -303,11 +303,6 @@
     "@types/node" "*"
     "@types/responselike" "^1.0.0"
 
-"@types/estree@0.0.39":
-  version "0.0.39"
-  resolved "https://registry.yarnpkg.com/@types/estree/-/estree-0.0.39.tgz#e177e699ee1b8c22d23174caaa7422644389509f"
-  integrity sha512-EYNwp3bU+98cpU4lAWYYL7Zz+2gryWH1qbdDTidVd6hkiR6weksdbMadyXKXNPEkQFhXM+hVO9ZygomHXp+AIw==
-
 "@types/eth-sig-util@^2.1.0":
   version "2.1.1"
   resolved "https://registry.yarnpkg.com/@types/eth-sig-util/-/eth-sig-util-2.1.1.tgz#839f784da04c8d2e12add9b37692c3f05a80603a"
@@ -1558,6 +1553,11 @@ fs.realpath@^1.0.0:
   resolved "https://registry.yarnpkg.com/fs.realpath/-/fs.realpath-1.0.0.tgz#1504ad2523158caa40db4a2787cb01411994ea4f"
   integrity sha1-FQStJSMVjKpA20onh8sBQRmU6k8=
 
+fsevents@~2.3.2:
+  version "2.3.3"
+  resolved "https://registry.yarnpkg.com/fsevents/-/fsevents-2.3.3.tgz#cac6407785d03675a2a5e1a5305c697b347d90d6"
+  integrity sha512-5xoDfX+fL7faATnagmWPpbFtwh/R77WmMMqqHGS65C3vvB0YHrgF+B1YmZ3441tMj5n63k0212XNoJwzlhffQw==
+
 function-bind@^1.1.1:
   version "1.1.1"
   resolved "https://registry.yarnpkg.com/function-bind/-/function-bind-1.1.1.tgz#a56899d3ea3c9bab874bb9773b7c5ede92f4895d"
@@ -2510,13 +2510,12 @@ rlp@^2.0.0, rlp@^2.2.3, rlp@^2.2.4, rlp@^2.2.6:
   dependencies:
     bn.js "^5.2.0"
 
-rollup@^0.64.0:
-  version "0.64.1"
-  resolved "https://registry.yarnpkg.com/rollup/-/rollup-0.64.1.tgz#9188ee368e5fcd43ffbc00ec414e72eeb5de87ba"
-  integrity sha512-+ThdVXrvonJdOTzyybMBipP0uz605Z8AnzWVY3rf+cSGnLO7uNkJBlN+9jXqWOomkvumXfm/esmBpA5d53qm7g==
-  dependencies:
-    "@types/estree" "0.0.39"
-    "@types/node" "*"
+rollup@^3.29.5:
+  version "3.29.5"
+  resolved "https://registry.yarnpkg.com/rollup/-/rollup-3.29.5.tgz#8a2e477a758b520fb78daf04bca4c522c1da8a54"
+  integrity sha512-GVsDdsbJzzy4S/v3dqWPJ7EfvZJfCHiDqe80IyrF59LYuP+e6U1LJoUqeuqRbwAWoMNoXivMNeNAOf5E22VA1w==
+  optionalDependencies:
+    fsevents "~2.3.2"
 
 safe-buffer@5.2.1, safe-buffer@^5.0.1, safe-buffer@^5.1.0, safe-buffer@^5.1.1, safe-buffer@^5.1.2, safe-buffer@^5.2.0, safe-buffer@^5.2.1, safe-buffer@~5.2.0:
   version "5.2.1"