diff --git a/Cargo.lock b/Cargo.lock
index ad54d41..5a75926 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -83,9 +83,9 @@ checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
 
 [[package]]
 name = "base64"
-version = "0.20.0"
+version = "0.21.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0ea22880d78093b0cbe17c89f64a7d457941e65759157ec6cb31a31d652b05e5"
+checksum = "a4a4ddaa51a5bc52a6948f74c06d20aaaddb71924eab79b8c97a8c556e942d6a"
 
 [[package]]
 name = "bitflags"
@@ -375,7 +375,7 @@ dependencies = [
 name = "example-build"
 version = "0.0.1"
 dependencies = [
- "base64 0.20.0",
+ "base64 0.21.0",
  "chrono",
  "progenitor",
  "progenitor-client",
@@ -1095,7 +1095,7 @@ name = "progenitor"
 version = "0.2.1-dev"
 dependencies = [
  "anyhow",
- "base64 0.20.0",
+ "base64 0.21.0",
  "chrono",
  "clap",
  "futures",
diff --git a/example-build/Cargo.toml b/example-build/Cargo.toml
index 9896844..9b2b9ff 100644
--- a/example-build/Cargo.toml
+++ b/example-build/Cargo.toml
@@ -8,7 +8,7 @@ edition = "2021"
 chrono = { version = "0.4", features = ["serde"] }
 progenitor-client = { path = "../progenitor-client" }
 reqwest = { version = "0.11.13", features = ["json", "stream"] }
-base64 = "0.20"
+base64 = "0.21"
 rand = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 uuid = { version = "1.2", features = ["serde", "v4"] }
diff --git a/progenitor/Cargo.toml b/progenitor/Cargo.toml
index a4345ce..41a30e1 100644
--- a/progenitor/Cargo.toml
+++ b/progenitor/Cargo.toml
@@ -20,7 +20,7 @@ serde_json = "1.0"
 clap = { version = "4.0.32", features = ["derive"] }
 
 [dev-dependencies]
-base64 = "0.20"
+base64 = "0.21"
 chrono = { version = "0.4", features = ["serde"] }
 futures = "0.3.25"
 percent-encoding = "2.2"