diff --git a/Cargo.toml b/Cargo.toml
index c2670d3..ea2d405 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,7 +1,7 @@
 [package]
 name = "base64"
-version = "0.22.0"
-authors = ["Alice Maz <alice@alicemaz.com>", "Marshall Pierce <marshall@mpierce.org>"]
+version = "0.22.1"
+authors = ["Marshall Pierce <marshall@mpierce.org>"]
 description = "encodes and decodes base64 as bytes or utf8"
 repository = "https://github.com/marshallpierce/rust-base64"
 documentation = "https://docs.rs/base64"
diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 46e281e..91b68a6 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -1,3 +1,7 @@
+# 0.22.1
+
+- Correct the symbols used for the predefined `alphabet::BIN_HEX`.
+
 # 0.22.0
 
 - `DecodeSliceError::OutputSliceTooSmall` is now conservative rather than precise. That is, the error will only occur if the decoded output _cannot_ fit, meaning that `Engine::decode_slice` can now be used with exactly-sized output slices. As part of this, `Engine::internal_decode` now returns `DecodeSliceError` instead of `DecodeError`, but that is not expected to affect any external callers.