diff --git a/Cargo.lock b/Cargo.lock
index 928de203a..36a466efa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -681,9 +681,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.18.0"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "oorandom"
diff --git a/Cargo.toml b/Cargo.toml
index 6795b84df..57675d5b3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -45,7 +45,7 @@ hex-literal = "0.4.1"
 iai = "0.1"
 modinverse = "0.1.0"
 num-bigint = "0.4.4"
-once_cell = "1.18.0"
+once_cell = "1.19.0"
 prio = { path = ".", features = ["crypto-dependencies", "test-util"] }
 rand = "0.8"
 statrs = "0.16.0"
diff --git a/supply-chain/audits.toml b/supply-chain/audits.toml
index 11d753c78..599549630 100644
--- a/supply-chain/audits.toml
+++ b/supply-chain/audits.toml
@@ -365,6 +365,11 @@ who = "David Cook <dcook@divviup.org>"
 criteria = "safe-to-deploy"
 delta = "1.17.2 -> 1.18.0"
 
+[[audits.once_cell]]
+who = "Brandon Pitman <bran@bran.land>"
+criteria = "safe-to-deploy"
+delta = "1.18.0 -> 1.19.0"
+
 [[audits.opaque-debug]]
 who = "David Cook <dcook@divviup.org>"
 criteria = "safe-to-deploy"