diff --git a/tools/checksum_updater/Cargo.lock b/tools/checksum_updater/Cargo.lock
index e3500960..b654496b 100644
--- a/tools/checksum_updater/Cargo.lock
+++ b/tools/checksum_updater/Cargo.lock
@@ -1974,9 +1974,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-encoder"
-version = "0.241.2"
+version = "0.243.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e01164c9dda68301e34fdae536c23ed6fe90ce6d97213ccc171eebbd3d02d6b8"
+checksum = "c55db9c896d70bd9fa535ce83cd4e1f2ec3726b0edd2142079f594fc3be1cb35"
 dependencies = [
  "leb128fmt",
  "wasmparser",
@@ -1984,9 +1984,9 @@ dependencies = [
 
 [[package]]
 name = "wasm-metadata"
-version = "0.241.2"
+version = "0.243.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "876fe286f2fa416386deedebe8407e6f19e0b5aeaef3d03161e77a15fa80f167"
+checksum = "eae05bf9579f45a62e8d0a4e3f52eaa8da518883ac5afa482ec8256c329ecd56"
 dependencies = [
  "anyhow",
  "indexmap",
@@ -1996,9 +1996,9 @@ dependencies = [
 
 [[package]]
 name = "wasmparser"
-version = "0.241.2"
+version = "0.243.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "46d90019b1afd4b808c263e428de644f3003691f243387d30d673211ee0cb8e8"
+checksum = "f6d8db401b0528ec316dfbe579e6ab4152d61739cfe076706d2009127970159d"
 dependencies = [
  "bitflags",
  "hashbrown",
@@ -2259,9 +2259,9 @@ checksum = "271414315aff87387382ec3d271b52d7ae78726f5d44ac98b4f4030c91880486"
 
 [[package]]
 name = "wit-bindgen"
-version = "0.48.1"
+version = "0.49.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f8c2adb5f74ac9395bc3121c99a1254bf9310482c27b13f97167aedb5887138"
+checksum = "c64be1abfe5d4fdb2d41581fac134e8c9204da1e604b5500926478b7f264e36f"
 dependencies = [
  "bitflags",
  "wit-bindgen-rust-macro",
@@ -2269,9 +2269,9 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-core"
-version = "0.48.1"
+version = "0.49.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9b881a098cae03686d7a0587f8f306f8a58102ad8da8b5599100fbe0e7f5800b"
+checksum = "886e8e938e4e9fe54143c080cbb99d7db5d19242b62ef225dbb28e17b3223bd8"
 dependencies = [
  "anyhow",
  "heck",
@@ -2289,9 +2289,9 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-rust"
-version = "0.48.1"
+version = "0.49.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "69667efa439a453e1d50dac939c6cab6d2c3ac724a9d232b6631dad2472a5b70"
+checksum = "145cac8fb12d99aea13a3f9e0d07463fa030edeebab2c03805eda0e1cc229bba"
 dependencies = [
  "anyhow",
  "heck",
@@ -2305,9 +2305,9 @@ dependencies = [
 
 [[package]]
 name = "wit-bindgen-rust-macro"
-version = "0.48.1"
+version = "0.49.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "eae2e22cceb5d105d52326c07e3e67603a861cc7add70fc467f7cc7ec5265017"
+checksum = "6042452ac4e58891cdb6321bb98aabb9827dbaf6f4e971734d8dd86813319aea"
 dependencies = [
  "anyhow",
  "prettyplease",
@@ -2320,9 +2320,9 @@ dependencies = [
 
 [[package]]
 name = "wit-component"
-version = "0.241.2"
+version = "0.243.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1fd0c57df25e7ee612d946d3b7646c1ddb2310f8280aa2c17e543b66e0812241"
+checksum = "36f9fc53513e461ce51dcf17a3e331752cb829f1d187069e54af5608fc998fe4"
 dependencies = [
  "anyhow",
  "bitflags",
@@ -2339,9 +2339,9 @@ dependencies = [
 
 [[package]]
 name = "wit-parser"
-version = "0.241.2"
+version = "0.243.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "09ef1c6ad67f35c831abd4039c02894de97034100899614d1c44e2268ad01c91"
+checksum = "df983a8608e513d8997f435bb74207bf0933d0e49ca97aa9d8a6157164b9b7fc"
 dependencies = [
  "anyhow",
  "id-arena",
diff --git a/tools/checksum_updater/Cargo.toml b/tools/checksum_updater/Cargo.toml
index b17c64e7..038661cb 100644
--- a/tools/checksum_updater/Cargo.toml
+++ b/tools/checksum_updater/Cargo.toml
@@ -31,7 +31,7 @@ tracing = "0.1"
 tracing-subscriber = { version = "0.3", features = ["env-filter"] }
 tempfile = "3.23"
 async-trait = "0.1"
-wit-bindgen = "0.48.1"  # WIT binding generation for macro usage (MUST match CLI version in wasm_toolchain.bzl)
+wit-bindgen = "0.49.0"  # WIT binding generation for macro usage (MUST match CLI version in wasm_toolchain.bzl)
 uuid = { version = "1.18", default-features = false }  # UUID generation for user service (deterministic, no getrandom dependency)
 bitflags = "2.6"  # Bitflags for WASI filesystem interfaces in generated bindings