diff --git a/Cargo.lock b/Cargo.lock
index 71e67bb52ac..ec3a5ca24e4 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -67,9 +67,9 @@ dependencies = [
 
 [[package]]
 name = "base64"
-version = "0.22.1"
+version = "0.21.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "72b3254f16251a8381aa12e40e3c4d2f0199f8c6508fbecb9d91f575e0fbb8c6"
+checksum = "9d297deb1925b89f2ccc13d7635fa0714f12c87adce1c75356b39ca9b7178567"
 
 [[package]]
 name = "base64"
@@ -371,7 +371,7 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b3314d5adb5d94bcdf56771f2e50dbbc80bb4bdf88967526706205ac9eff24eb"
 dependencies = [
- "base64 0.21.7",
+ "base64 0.22.1",
  "bytes",
  "headers-core",
  "http",
diff --git a/changelog.d/18561.misc b/changelog.d/18561.misc
new file mode 100644
index 00000000000..8e4ee71356c
--- /dev/null
+++ b/changelog.d/18561.misc
@@ -0,0 +1 @@
+Increase performance of introspecting access tokens when using delegated auth.