diff --git a/CHANGELOG.md b/CHANGELOG.md
index 28ffd22..2e94046 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,12 @@ This project attempts to adhere to [Semantic Versioning](http://semver.org).
 
 ## [Unreleased]
 
+## [0.9.1] - (2019-04-08)
+
+### Changed
+
+- Faster Damerau-Levenshtein implementation (thanks [@lovasoa](https://github.com/lovasoa))
+
 ## [0.9.0] - (2019-04-06)
 
 ### Added
@@ -106,7 +112,8 @@ vector of results (thanks @ovarene)
 ### Added
 - Implement Hamming, Jaro, Jaro-Winkler, and Levenshtein
 
-[Unreleased]: https://github.com/dguo/strsim-rs/compare/0.9.0...HEAD
+[Unreleased]: https://github.com/dguo/strsim-rs/compare/0.9.1...HEAD
+[0.9.1]: https://github.com/dguo/strsim-rs/compare/0.9.0...0.9.1
 [0.9.0]: https://github.com/dguo/strsim-rs/compare/0.8.0...0.9.0
 [0.8.0]: https://github.com/dguo/strsim-rs/compare/0.7.0...0.8.0
 [0.7.0]: https://github.com/dguo/strsim-rs/compare/0.6.0...0.7.0
diff --git a/Cargo.toml b/Cargo.toml
index 8dd20c9..4ff6dce 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "strsim"
-version = "0.9.0"
+version = "0.9.1"
 authors = ["Danny Guo <dannyguo91@gmail.com>"]
 description = """
 Implementations of string similarity metrics.
diff --git a/README.md b/README.md
index b734269..e350e08 100644
--- a/README.md
+++ b/README.md
@@ -18,7 +18,7 @@ There are also generic versions of the functions for non-string inputs.
 your `Cargo.toml`:
 ```toml
 [dependencies]
-strsim = "0.9.0"
+strsim = "0.9.1"
 ```
 
 ## Usage
diff --git a/dev b/dev
index ab9d9d3..ba1f2ce 100755
--- a/dev
+++ b/dev
@@ -10,7 +10,7 @@ parser = argparse.ArgumentParser(prog='./dev')
 subparsers = parser.add_subparsers(metavar='<command>', title='commands')
 command = [
     'docker', 'run', '-it', '--rm', '-v', os.getcwd() + ':/src:cached',
-    '-w=/src', 'rust:1.30.0'
+    '-w=/src', 'rust:1.31.0'
 ]
 
 def cargo(args, remaining):