diff --git a/Cargo.lock b/Cargo.lock
index 0038928..3c3cb78 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -706,9 +706,9 @@ 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 = "owo-colors"
diff --git a/nexlint/Cargo.toml b/nexlint/Cargo.toml
index cacd8f6..06d20c7 100644
--- a/nexlint/Cargo.toml
+++ b/nexlint/Cargo.toml
@@ -11,5 +11,5 @@ determinator = "0.12.0"
 guppy = "0.17.17"
 hakari = { version = "0.17.8", features = ["cli-support"] }
 hex = "0.4.3"
-once_cell = "1.20.3"
+once_cell = "1.21.3"
 serde = { version = "1.0.219", features = ["derive"] }