diff --git a/Cargo.lock b/Cargo.lock
index 974656e..f5e1ee0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -446,7 +446,7 @@ checksum = "0c790de23124f9ab44544d7ac05d60440adc586479ce501c1d6d7da3cd8c9cf5"
 
 [[package]]
 name = "string-interner"
-version = "0.19.0"
+version = "0.20.0"
 dependencies = [
  "criterion",
  "hashbrown",
diff --git a/Cargo.toml b/Cargo.toml
index c5c991a..371a8e6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "string-interner"
-version = "0.19.0"
+version = "0.20.0"
 authors = ["Robbepop"]
 license = "MIT/Apache-2.0"
 readme = "README.md"
diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 2cfe6d7..690d091 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,25 @@
 # Release Notes
 
+## 0.20.0 - 2026/04/30
+
+### Fixed
+
+- Fixed off-by-one bug in `serde` support. [#91]
+
+### Improvements
+
+- Improve documentation about custom hashing. [#90]
+- Add notification about `unchecked` resolution for `BufferBackend`. [#92]
+- Updated dependencies. [#100] [#101]
+- Specify Rust MSRV to be 1.65. [#101]
+
+[#90]: https://github.com/Robbepop/string-interner/pull/90
+[#91]: https://github.com/Robbepop/string-interner/pull/91
+[#92]: https://github.com/Robbepop/string-interner/pull/92
+[#96]: https://github.com/Robbepop/string-interner/pull/96
+[#100]: https://github.com/Robbepop/string-interner/pull/100
+[#101]: https://github.com/Robbepop/string-interner/pull/101
+
 ## 0.19.0 - 2025/02/11
 
 ## Fixed