diff --git a/frb_example/pure_dart/rust/Cargo.lock b/frb_example/pure_dart/rust/Cargo.lock
index 722b062ec7..366d21a16d 100644
--- a/frb_example/pure_dart/rust/Cargo.lock
+++ b/frb_example/pure_dart/rust/Cargo.lock
@@ -863,27 +863,14 @@ checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
 [[package]]
 name = "wasm-bindgen"
-version = "0.2.100"
+version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1edc8929d7499fc4e8f0be2262a241556cfc54a0bea223790e71446f2aab1ef5"
+checksum = "49ace1d07c165b0864824eee619580c4689389afa9dc9ed3a4c75040d82e6790"
 dependencies = [
  "cfg-if",
  "once_cell",
  "rustversion",
  "wasm-bindgen-macro",
-]
-
-[[package]]
-name = "wasm-bindgen-backend"
-version = "0.2.100"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f0a0651a5c2bc21487bde11ee802ccaf4c51935d0d3d42a6101f98161700bc6"
-dependencies = [
- "bumpalo",
- "log",
- "proc-macro2",
- "quote",
- "syn",
  "wasm-bindgen-shared",
 ]
 
@@ -901,9 +888,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro"
-version = "0.2.100"
+version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7fe63fc6d09ed3792bd0897b314f53de8e16568c2b3f7982f468c0bf9bd0b407"
+checksum = "8e68e6f4afd367a562002c05637acb8578ff2dea1943df76afb9e83d177c8578"
 dependencies = [
  "quote",
  "wasm-bindgen-macro-support",
@@ -911,22 +898,22 @@ dependencies = [
 
 [[package]]
 name = "wasm-bindgen-macro-support"
-version = "0.2.100"
+version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8ae87ea40c9f689fc23f209965b6fb8a99ad69aeeb0231408be24920604395de"
+checksum = "d95a9ec35c64b2a7cb35d3fead40c4238d0940c86d107136999567a4703259f2"
 dependencies = [
+ "bumpalo",
  "proc-macro2",
  "quote",
  "syn",
- "wasm-bindgen-backend",
  "wasm-bindgen-shared",
 ]
 
 [[package]]
 name = "wasm-bindgen-shared"
-version = "0.2.100"
+version = "0.2.121"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a05d73b933a847d6cccdda8f838a22ff101ad9bf93e33684f39c1f5f0eece3d"
+checksum = "c4e0100b01e9f0d03189a92b96772a1fb998639d981193d7dbab487302513441"
 dependencies = [
  "unicode-ident",
 ]
diff --git a/frb_example/pure_dart/rust/Cargo.toml b/frb_example/pure_dart/rust/Cargo.toml
index ffa873909d..d32d489d2e 100644
--- a/frb_example/pure_dart/rust/Cargo.toml
+++ b/frb_example/pure_dart/rust/Cargo.toml
@@ -14,7 +14,7 @@ backtrace = "0.3.68"
 chrono = "0.4.26"
 uuid = "1.4.1"
 frb_example_pure_dart_example_external_lib = { path = "./example_external_lib" }
-wasm-bindgen = "0.2.88" # TODO temp experiment
+wasm-bindgen = "0.2.121" # TODO temp experiment
 byteorder = "1.5.0"
 lazy_static = "1.4.0"
 tempfile = "3.8.1"