diff --git a/CHANGELOG.md b/CHANGELOG.md
index c000d42..73fb10f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,15 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## [Unreleased]
 
+## [4.0.3]
+- Update dependencies
+
+## [4.0.2]
+- Changed lookup tables to Tuple for performance improvements
+
+## [4.0.1]
+- Fixed missing iterate and length methods
+
 ## [4.0.0]
 ### Added
 - An abstract type `BioSymbol` has been added.
diff --git a/Project.toml b/Project.toml
index 9f60ceb..42a252d 100644
--- a/Project.toml
+++ b/Project.toml
@@ -1,7 +1,7 @@
 name = "BioSymbols"
 uuid = "3c28c6f8-a34d-59c4-9654-267d177fcfa9"
 authors = ["Ben J. Ward <benjward@protonmail.com>"]
-version = "5.1.2"
+version = "5.1.3"
 
 [deps]
 PrecompileTools = "aea7be01-6a6a-4083-8856-8a6e6704d82a"