diff --git a/Cargo.lock b/Cargo.lock
index 29304436..b36f593b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -973,9 +973,12 @@ 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 = "percent-encoding"
@@ -1021,6 +1024,12 @@ version = "0.3.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d231b230927b5e4ad203db57bbcbee2802f6bce620b1e4a9024a07d94e2907ec"
 
+[[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 06ad46e2..c74d60f5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,7 +22,7 @@ ignore = "0.4.23"
 json_comments = "0.2.2"
 log = "0.4.22"
 mdsf = { path = "./mdsf", features = ["json-schema"] }
-once_cell = "1.19.0"
+once_cell = "1.20.1"
 regex = "1.11.0"
 reqwest = { version = "0.12.8", default-features = false, features = [
   "blocking",