diff --git a/examples/deterministic-roundtrip/yarn.lock b/examples/deterministic-roundtrip/yarn.lock
index c7a43e9..b6e1946 100644
--- a/examples/deterministic-roundtrip/yarn.lock
+++ b/examples/deterministic-roundtrip/yarn.lock
@@ -98,9 +98,9 @@ node-fetch@2.6.12:
     whatwg-url "^5.0.0"
 
 protobufjs@^7.2.4:
-  version "7.2.6"
-  resolved "https://registry.yarnpkg.com/protobufjs/-/protobufjs-7.2.6.tgz#4a0ccd79eb292717aacf07530a07e0ed20278215"
-  integrity sha512-dgJaEDDL6x8ASUZ1YqWciTRrdOuYNzoOf27oHNfdyvKqHr5i0FV7FSLU+aIeFjyFgVxrpTOtQUi0BLLBymZaBw==
+  version "7.5.5"
+  resolved "https://registry.yarnpkg.com/protobufjs/-/protobufjs-7.5.5.tgz#b7089ca4410374c75150baf277353ef76db69f96"
+  integrity sha512-3wY1AxV+VBNW8Yypfd1yQY9pXnqTAN+KwQxL8iYm3/BjKYMNg4i0owhEe26PWDOMaIrzeeF98Lqd5NGz4omiIg==
   dependencies:
     "@protobufjs/aspromise" "^1.1.2"
     "@protobufjs/base64" "^1.1.2"
diff --git a/yarn.lock b/yarn.lock
index b13cc72..83a8376 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3828,9 +3828,9 @@ protobufjs-cli@^1.1.1:
     uglify-js "^3.7.7"
 
 protobufjs@^7.2.5:
-  version "7.3.2"
-  resolved "https://registry.yarnpkg.com/protobufjs/-/protobufjs-7.3.2.tgz#60f3b7624968868f6f739430cfbc8c9370e26df4"
-  integrity sha512-RXyHaACeqXeqAKGLDl68rQKbmObRsTIn4TYVUUug1KfS47YWCo5MacGITEryugIgZqORCvJWEk4l449POg5Txg==
+  version "7.5.5"
+  resolved "https://registry.yarnpkg.com/protobufjs/-/protobufjs-7.5.5.tgz#b7089ca4410374c75150baf277353ef76db69f96"
+  integrity sha512-3wY1AxV+VBNW8Yypfd1yQY9pXnqTAN+KwQxL8iYm3/BjKYMNg4i0owhEe26PWDOMaIrzeeF98Lqd5NGz4omiIg==
   dependencies:
     "@protobufjs/aspromise" "^1.1.2"
     "@protobufjs/base64" "^1.1.2"