diff --git a/CHANGELOG.md b/CHANGELOG.md
index da1b26b..a4aa70e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,11 @@ All notable changes to this project will be documented in this file.
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/), and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [v1.1.1] - 2024-09-30
+
+### Security
+- Security fixes suggested by Snyk: updated `zipp` to version 3.19.1 or higher to avoid a vulnerability. (`zipp>=3.19.1`)
+
 ## [v1.1.0] - 2024-05-27
 
 ### Added
diff --git a/SECURITY.md b/SECURITY.md
index 08be759..7fbe3d7 100644
--- a/SECURITY.md
+++ b/SECURITY.md
@@ -6,6 +6,7 @@ Use this section to tell people about which versions of your project are current
 
 | Version | Supported          |
 | ------- | ------------------ |
+| 1.1.1   | :white_check_mark: |
 | 1.1.0   | :white_check_mark: |
 | 1.0.0   | :white_check_mark: |
 | 0.0.1   | :x:                |
diff --git a/src/ecutils/__init__.py b/src/ecutils/__init__.py
index 6849410..a82b376 100755
--- a/src/ecutils/__init__.py
+++ b/src/ecutils/__init__.py
@@ -1 +1 @@
-__version__ = "1.1.0"
+__version__ = "1.1.1"