diff --git a/Cargo.lock b/Cargo.lock
index 33231651..4aed97ac 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2923,9 +2923,12 @@ dependencies = [
 
 [[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 = "oorandom"
@@ -3251,6 +3254,12 @@ dependencies = [
  "plotters-backend",
 ]
 
+[[package]]
+name = "portable-atomic"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc9c68a3f6da06753e9335d63e27f6b9754dd1920d941135b7ea8224f141adb2"
+
 [[package]]
 name = "powerfmt"
 version = "0.2.0"
diff --git a/Cargo.toml b/Cargo.toml
index e94c8614..b6ef229b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -34,7 +34,7 @@ futures         = "0.3.30"
 log             = "0.4.22"
 mdbook          = "0.4.40"
 miette          = {version = "7.2"}
-once_cell       = "1.19"
+once_cell       = "1.20"
 pulldown-cmark  = "0.12.1"
 regex           = "1.11.0"
 semver          = {version = "1.0", features = ["serde"]}