diff --git a/native/btleplug_client/Cargo.lock b/native/btleplug_client/Cargo.lock
index 92352fc..bf10656 100644
--- a/native/btleplug_client/Cargo.lock
+++ b/native/btleplug_client/Cargo.lock
@@ -705,9 +705,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.20.3"
+version = "1.21.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "945462a4b81e43c4e3ba96bd7b49d834c6f61198356aa858733bc4acf3cbe62e"
+checksum = "42f5e15c9953c5e4ccceeb2e7382a716482c34515315f7b03532b8b4e8393d2d"
 
 [[package]]
 name = "parking_lot"
diff --git a/native/btleplug_client/Cargo.toml b/native/btleplug_client/Cargo.toml
index aae22bc..c3fbb92 100644
--- a/native/btleplug_client/Cargo.toml
+++ b/native/btleplug_client/Cargo.toml
@@ -33,7 +33,7 @@ rustler = { version = "0.36.1", default-features = false, features = ["derive",
 rustler_codegen = "*"
 tokio = { version = "1", features = ["full"] }
 futures = "0.3.31"
-once_cell = "1.19"
+once_cell = "1.21"
 lazy_static = "1.3.0"
 
 # MiMalloc won´t compile on Windows with the GCC compiler.