diff --git a/codex-rs/Cargo.lock b/codex-rs/Cargo.lock
index 992ba04..b5052ec 100644
--- a/codex-rs/Cargo.lock
+++ b/codex-rs/Cargo.lock
@@ -5459,7 +5459,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -9235,9 +9235,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.21.3"
+version = "1.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
+checksum = "9f7c3e4beb33f85d45ae3e3a1792185706c8e16d043238c593331cc7cd313b50"
 dependencies = [
  "critical-section",
  "portable-atomic",
diff --git a/codex-rs/Cargo.toml b/codex-rs/Cargo.toml
index 7207fd3..60f6213 100644
--- a/codex-rs/Cargo.toml
+++ b/codex-rs/Cargo.toml
@@ -311,7 +311,7 @@ mime_guess = "2.0.5"
 multimap = "0.10.0"
 notify = "8.2.0"
 nucleo = { git = "https://github.com/helix-editor/nucleo.git", rev = "4253de9faabb4e5c6d81d946a5e35a90f87347ee" }
-once_cell = "1.20.2"
+once_cell = "1.21.4"
 openssl-sys = "*"
 opentelemetry = "0.31.0"
 opentelemetry-appender-tracing = "0.31.0"