diff --git a/Cargo.lock b/Cargo.lock
index e4f6d1f..a6cbc52 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -753,9 +753,9 @@ dependencies = [
 
 [[package]]
 name = "protobuf"
-version = "3.2.0"
+version = "3.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b55bad9126f378a853655831eb7363b7b01b81d19f8cb1218861086ca4a1a61e"
+checksum = "58678a64de2fced2bdec6bca052a6716a0efe692d6e3f53d1bda6a1def64cfc0"
 dependencies = [
  "once_cell",
  "protobuf-support",
@@ -764,9 +764,9 @@ dependencies = [
 
 [[package]]
 name = "protobuf-support"
-version = "3.2.0"
+version = "3.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a5d4d7b8601c814cfb36bcebb79f0e61e45e1e93640cf778837833bbed05c372"
+checksum = "e1ed294a835b0f30810e13616b1cd34943c6d1e84a8f3b0dcfe466d256c3e7e7"
 dependencies = [
  "thiserror",
 ]
diff --git a/Cargo.toml b/Cargo.toml
index 39cdb7b..c711039 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -32,7 +32,7 @@ serde_json = { version = "1.0", optional = true }
 serde-wasm-bindgen = "0.4"
 workers = "0.1.0"
 flatbuffers = "22.10.26"
-protobuf = "3.2.0"
+protobuf = "3.4.0"
 jni = "0.20.0"
 js-sys = "0.3.60"