diff --git a/CHANGELOG.md b/CHANGELOG.md
index b18620d..8adce1a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,10 @@
 Notable changes to this project are documented in this changelog.  
 This project adheres to the [semantic versioning] specification.
 
+## [1.3.1] – 2023-03-27
+
+- Ensure the additional_thumbprints variable allows null values ([750f0f6](https://github.com/unfunco/terraform-aws-oidc-github/commit/750f0f6b0296057ff9910cebd2ac2f577b0cdb90))
+
 ## [1.3.0] – 2023-03-21
 
 - Added a variable to allow additional thumbprints to be specified ([f3ca314](https://github.com/unfunco/terraform-aws-oidc-github/commit/f3ca3143052eecf59fc08be8dbb288855764414f))
@@ -101,4 +105,5 @@ This project adheres to the [semantic versioning] specification.
 [1.2.0]: https://github.com/unfunco/terraform-aws-oidc-github/compare/v1.1.1...v1.2.0
 [1.2.1]: https://github.com/unfunco/terraform-aws-oidc-github/compare/v1.2.0...v1.2.1
 [1.3.0]: https://github.com/unfunco/terraform-aws-oidc-github/compare/v1.2.1...v1.3.0
+[1.3.1]: https://github.com/unfunco/terraform-aws-oidc-github/compare/v1.3.0...v1.3.1
 [semantic versioning]: https://semver.org
diff --git a/README.md b/README.md
index 3a22177..393f50e 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ provider "aws" {
 
 module "oidc_github" {
   source  = "unfunco/oidc-github/aws"
-  version = "1.3.0"
+  version = "1.3.1"
 
   github_repositories = [
     "org/repo",