diff --git a/Cargo.lock b/Cargo.lock
index 66970a1..05b0f71 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -266,9 +266,18 @@ checksum = "61807f77802ff30975e01f4f071c8ba10c022052f98b3294119f3e615d13e5be"
 
 [[package]]
 name = "once_cell"
-version = "1.19.0"
+version = "1.20.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
+checksum = "82881c4be219ab5faaf2ad5e5e5ecdff8c66bd7402ca3160975c93b24961afd1"
+dependencies = [
+ "portable-atomic",
+]
+
+[[package]]
+name = "portable-atomic"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc9c68a3f6da06753e9335d63e27f6b9754dd1920d941135b7ea8224f141adb2"
 
 [[package]]
 name = "predicates"
diff --git a/Cargo.toml b/Cargo.toml
index fbcbb0b..850a9c0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ repository = "https://github.com/trailofbits/build-wrap"
 [dependencies]
 anyhow = "1.0"
 home = "0.5"
-once_cell = "1.19"
+once_cell = "1.20"
 tempfile = "3.12"
 toml = "0.8"