diff --git a/Cargo.lock b/Cargo.lock
index bd3b7d382c833..f22bd25bf6b82 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -649,7 +649,7 @@ version = "0.32.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0e45b67ea596bb94741ef15ba1d90b72c92bdc07553d8033734cb620a2b39f1c"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "futures 0.3.28",
  "http",
@@ -1365,7 +1365,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8e29286b9edfdd6f2c7e9d970bb5b015df8621258acab9ecfcea09b2d7692467"
 dependencies = [
  "async-trait",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "dyn-clone",
  "futures 0.3.28",
@@ -1506,9 +1506,9 @@ checksum = "0ea22880d78093b0cbe17c89f64a7d457941e65759157ec6cb31a31d652b05e5"
 
 [[package]]
 name = "base64"
-version = "0.21.4"
+version = "0.21.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9ba43ea6f343b788c8764558649e08df62f86c6ef251fdaeb1ffd010a9ae50a2"
+checksum = "35636a1494ede3b646cc98f74f8e62c773a38a659ebc777a2cf26b9b74171df9"
 
 [[package]]
 name = "base64-simd"
@@ -1621,7 +1621,7 @@ version = "0.15.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f03db470b3c0213c47e978da93200259a1eb4dae2e5512cba9955e2b540a6fc6"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "bollard-stubs",
  "bytes 1.5.0",
  "chrono",
@@ -2242,7 +2242,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a97e158411823bf87634e2e47552f712e51fa4119cdb2255da799e7cb5c90a9"
 dependencies = [
  "anyhow",
- "base64 0.21.4",
+ "base64 0.21.5",
  "hex",
  "lazy_static",
  "num_enum 0.6.1",
@@ -3908,7 +3908,7 @@ version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06683b93020a07e3dbcf5f8c0f6d40080d725bea7936fc01ad345c01b97dc270"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "headers-core",
  "http",
@@ -4658,7 +4658,7 @@ version = "0.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cd990069640f9db34b3b0f7a1afc62a05ffaa3be9b66aa3c313f58346df7f788"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "chrono",
  "http",
@@ -5845,7 +5845,7 @@ dependencies = [
  "async-compat",
  "async-trait",
  "backon",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "chrono",
  "flagset",
@@ -6395,7 +6395,7 @@ version = "0.6.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49b6c5ef183cd3ab4ba005f1ca64c21e8bd97ce4699cfea9e8d9a2c4958ca520"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "byteorder",
  "bytes 1.5.0",
  "fallible-iterator",
@@ -6721,7 +6721,7 @@ version = "0.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "057237efdb71cf4b3f9396302a3d6599a92fa94063ba537b66130980ea9909f3"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "once_cell",
  "prost 0.12.1",
  "prost-types 0.12.1",
@@ -7270,7 +7270,7 @@ version = "0.11.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "046cd98826c46c2ac8ddecae268eb5c2e58628688a5fc7a2643704a73faba95b"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "encoding_rs",
  "futures-core",
@@ -7590,7 +7590,7 @@ version = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2d3987094b1d07b653b7dfdc3f70ce9a1da9c51ac18c1b06b662e4f9a0e9f4b2"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
 ]
 
 [[package]]
@@ -7946,7 +7946,7 @@ version = "3.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "64cd236ccc1b7a29e7e2739f27c0b2dd199804abc4290e32f59f3b68d6405c23"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "chrono",
  "hex",
  "indexmap 1.9.3",
@@ -8208,7 +8208,7 @@ version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fff23fdd767425c13e6f354b7443b3cc0c23097ae077e2211ef8143fa68ad014"
 dependencies = [
- "base64 0.21.4",
+ "base64 0.21.5",
  "log",
  "openssl",
  "serde",
@@ -8966,7 +8966,7 @@ dependencies = [
  "async-stream",
  "async-trait",
  "axum",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "futures-core",
  "futures-util",
@@ -8997,7 +8997,7 @@ dependencies = [
  "async-stream",
  "async-trait",
  "axum",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "flate2",
  "h2",
@@ -9073,7 +9073,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "61c5bb1d698276a2443e5ecfabc1008bf15a36c12e6a7176e7bf089ea9131140"
 dependencies = [
  "async-compression",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bitflags 2.4.0",
  "bytes 1.5.0",
  "futures-core",
@@ -9708,7 +9708,7 @@ dependencies = [
  "azure_identity",
  "azure_storage",
  "azure_storage_blobs",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bloomy",
  "bollard",
  "bytes 1.5.0",
@@ -10029,7 +10029,7 @@ dependencies = [
  "async-graphql 5.0.10",
  "async-stream",
  "async-trait",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bitmask-enum",
  "bytes 1.5.0",
  "chrono",
@@ -10189,7 +10189,7 @@ dependencies = [
  "anymap",
  "arbitrary",
  "base16",
- "base64 0.21.4",
+ "base64 0.21.5",
  "bytes 1.5.0",
  "cbc",
  "cfb-mode",
@@ -10755,7 +10755,7 @@ checksum = "c6f71803d3a1c80377a06221e0530be02035d5b3e854af56c6ece7ac20ac441d"
 dependencies = [
  "assert-json-diff 2.0.2",
  "async-trait",
- "base64 0.21.4",
+ "base64 0.21.5",
  "deadpool",
  "futures 0.3.28",
  "futures-timer",
diff --git a/Cargo.toml b/Cargo.toml
index 799b4760422c2..cf12b8212d526 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -248,7 +248,7 @@ arc-swap = { version = "1.6", default-features = false, optional = true }
 async-compression = { version = "0.4.4", default-features = false, features = ["tokio", "gzip", "zstd"], optional = true }
 apache-avro = { version = "0.16.0", default-features = false, optional = true }
 axum = { version = "0.6.20", default-features = false }
-base64 = { version = "0.21.4", default-features = false, optional = true }
+base64 = { version = "0.21.5", default-features = false, optional = true }
 bloomy  = { version = "1.2.0", default-features = false, optional = true }
 bollard = { version = "0.15.0", default-features = false, features = ["ssl", "chrono"], optional = true }
 bytes = { version = "1.5.0", default-features = false, features = ["serde"] }
@@ -359,7 +359,7 @@ azure_core = { version = "0.16", default-features = false, features = ["enable_r
 azure_identity = { version = "0.16", default-features = false, features = ["enable_reqwest"] }
 azure_storage_blobs = { version = "0.16", default-features = false, features = ["azurite_workaround"] }
 azure_storage = { version = "0.16", default-features = false }
-base64 = "0.21.4"
+base64 = "0.21.5"
 criterion = { version = "0.5.1", features = ["html_reports", "async_tokio"] }
 itertools = { version = "0.11.0", default-features = false, features = ["use_alloc"] }
 libc = "0.2.149"
diff --git a/lib/vector-core/Cargo.toml b/lib/vector-core/Cargo.toml
index cc9b8abad433b..81e533ca8d12f 100644
--- a/lib/vector-core/Cargo.toml
+++ b/lib/vector-core/Cargo.toml
@@ -78,7 +78,7 @@ schannel = "0.1.22"
 prost-build = "0.12"
 
 [dev-dependencies]
-base64 = "0.21.4"
+base64 = "0.21.5"
 chrono-tz = { version = "0.8.3", default-features = false }
 criterion = { version = "0.5.1", features = ["html_reports"] }
 env-test-util = "1.0.1"