diff --git a/Cargo.lock b/Cargo.lock
index eb201a4..16696ad 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -379,9 +379,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.20.3"
+version = "1.21.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "945462a4b81e43c4e3ba96bd7b49d834c6f61198356aa858733bc4acf3cbe62e"
+checksum = "d75b0bedcc4fe52caa0e03d9f1151a323e4aa5e2d78ba3580400cd3c9e2bc4bc"
 
 [[package]]
 name = "option-ext"
diff --git a/nix-script/Cargo.toml b/nix-script/Cargo.toml
index 2c0fb5b..0d0f0c9 100644
--- a/nix-script/Cargo.toml
+++ b/nix-script/Cargo.toml
@@ -12,7 +12,7 @@ fs2 = "0.4.3"
 lazy_static = "1.5.0"
 log = "0.4.26"
 nix-script-directives = { path = "../nix-script-directives" }
-once_cell = "1.20.3"
+once_cell = "1.21.1"
 path-absolutize = "3.1.1"
 seahash = "4.1.0"
 serde_json = "1.0.140"