diff --git a/Cargo.lock b/Cargo.lock
index 30305e7..dcd5af9 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -521,9 +521,12 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.17.0"
+version = "1.20.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6f61fba1741ea2b3d6a1e3178721804bb716a68a6aeba1149b5d52e3d464ea66"
+checksum = "82881c4be219ab5faaf2ad5e5e5ecdff8c66bd7402ca3160975c93b24961afd1"
+dependencies = [
+ "portable-atomic",
+]
 
 [[package]]
 name = "openssl-probe"
@@ -563,6 +566,12 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "portable-atomic"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cc9c68a3f6da06753e9335d63e27f6b9754dd1920d941135b7ea8224f141adb2"
+
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.20+deprecated"
diff --git a/sns-discord/Cargo.toml b/sns-discord/Cargo.toml
index f7cdda4..70b779b 100644
--- a/sns-discord/Cargo.toml
+++ b/sns-discord/Cargo.toml
@@ -13,4 +13,4 @@ hyper = { version = "0.14.23", features = ["client", "http2", "http1"] }
 hyper-rustls = "0.23.2"
 serde = "1.0.210"
 serde_json = "1.0.128"
-once_cell = "1.17.0"
+once_cell = "1.20.1"