diff --git a/Cargo.lock b/Cargo.lock
index 87ae1e6c98b..2a17ad46b07 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1691,7 +1691,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "async-trait",
- "base64 0.20.0",
+ "base64 0.21.0",
  "omicron-sled-agent",
  "omicron-test-utils",
  "oxide-client",
@@ -3237,7 +3237,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "api_identity",
- "base64 0.20.0",
+ "base64 0.21.0",
  "chrono",
  "nexus-passwords",
  "omicron-common",
@@ -3497,7 +3497,7 @@ dependencies = [
  "async-bb8-diesel",
  "async-trait",
  "authz-macros",
- "base64 0.20.0",
+ "base64 0.21.0",
  "bb8",
  "chrono",
  "clap 4.1.1",
@@ -3886,7 +3886,7 @@ dependencies = [
 name = "oxide-client"
 version = "0.1.0"
 dependencies = [
- "base64 0.20.0",
+ "base64 0.21.0",
  "chrono",
  "futures",
  "progenitor",
diff --git a/Cargo.toml b/Cargo.toml
index 928944e1aa8..787e2a42888 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -93,7 +93,7 @@ async-bb8-diesel = { git = "https://github.com/oxidecomputer/async-bb8-diesel",
 async-trait = "0.1.60"
 authz-macros = { path = "nexus/authz-macros" }
 backoff = { version = "0.4.0", features = [ "tokio" ] }
-base64 = "0.20.0"
+base64 = "0.21.0"
 bb8 = "0.8.0"
 bcs = "0.1.4"
 bincode = "1.3.3"