diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9e8cabc..4c8aea4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,15 @@ project adheres to [Semantic Versioning](http://semver.org/).
 Older versions are detailed as [GitHub
 releases](https://github.com/mudge/re2/releases) for this project.
 
+## [2.1.1] - 2023-09-18
+### Fixed
+- Worked around a deprecation warning re the use of ANYARGS when compiling
+  against recent Ruby versions.
+
+### Changed
+- Various internal C++ style improvements to reduce unnecessary memory usage
+  when accessing named capturing groups.
+
 ## [2.1.0] - 2023-09-16
 ### Fixed
 - As RE2 only supports UTF-8 and ISO-8859-1 encodings, fix an inconsistency
@@ -147,6 +156,7 @@ releases](https://github.com/mudge/re2/releases) for this project.
 ### Fixed
 - In Ruby 1.9.2 and later, re2 will now set the correct encoding for strings
 
+[2.1.1]: https://github.com/mudge/re2/releases/tag/v2.1.1
 [2.1.0]: https://github.com/mudge/re2/releases/tag/v2.1.0
 [2.0.0]: https://github.com/mudge/re2/releases/tag/v2.0.0
 [2.0.0.beta2]: https://github.com/mudge/re2/releases/tag/v2.0.0.beta2
diff --git a/README.md b/README.md
index f5db949..d4d2397 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@ Ruby bindings to [RE2][], a "fast, safe, thread-friendly alternative to
 backtracking regular expression engines like those used in PCRE, Perl, and
 Python".
 
-**Current version:** 2.1.0  
+**Current version:** 2.1.1  
 **Supported Ruby versions:** 2.6, 2.7, 3.0, 3.1, 3.2  
 **Bundled RE2 version:** libre2.11 (2023-09-01)  
 **Supported RE2 versions:** libre2.0 (< 2020-03-02), libre2.1 (2020-03-02), libre2.6 (2020-03-03), libre2.7 (2020-05-01), libre2.8 (2020-07-06), libre2.9 (2020-11-01), libre2.10 (2022-12-01), libre2.11 (2023-07-01)
diff --git a/lib/re2/version.rb b/lib/re2/version.rb
index 5fdc95a..3d5dc0e 100644
--- a/lib/re2/version.rb
+++ b/lib/re2/version.rb
@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module RE2
-  VERSION = "2.1.0"
+  VERSION = "2.1.1"
 end