diff --git a/CHANGELOG.md b/CHANGELOG.md
index ee6d9b9f..3ed9bc3c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,5 @@
-# Version 1.1.0 (1 May 2025)
+# Version 1.1.1 (28 May 2025)
+
+Fixed Apple Silicon installer.
+Fixed experimental data file parser.
 
-New, updated documentation.
-Updated numpy and Qt6 versions.
diff --git a/EasyReflectometryApp/Backends/Mock/Home.qml b/EasyReflectometryApp/Backends/Mock/Home.qml
index 7af2fae8..963a0038 100644
--- a/EasyReflectometryApp/Backends/Mock/Home.qml
+++ b/EasyReflectometryApp/Backends/Mock/Home.qml
@@ -7,8 +7,8 @@ QtObject {
     property bool created: false
 
     readonly property var version: {
-        'number': '1.1.0',
-        'date': '1 May 2025',
+        'number': '1.1.1',
+        'date': '28 May 2025',
     }
 
     readonly property var urls: {
diff --git a/EasyReflectometryApp/__version__.py b/EasyReflectometryApp/__version__.py
index 1a72d32e..b3ddbc41 100644
--- a/EasyReflectometryApp/__version__.py
+++ b/EasyReflectometryApp/__version__.py
@@ -1 +1 @@
-__version__ = '1.1.0'
+__version__ = '1.1.1'
diff --git a/INSTALLATION.md b/INSTALLATION.md
index b1044273..1fb5a3c6 100644
--- a/INSTALLATION.md
+++ b/INSTALLATION.md
@@ -2,11 +2,11 @@
 
 To make the installation of EasyReflectometry as easy as possible, we prepare packaged releases for three major operating systems: 
 
-- [Windows](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_windows-2022.exe)
-- [MacOS](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_macos-13-Intel.zip) (Intel)
-- [MacOS](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_macos-14-AppleSilicon.zip) (ARM)
-- [Linux](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_ubuntu-22.04) (built on Ubuntu-22.04)
-- [Linux](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_ubuntu-24.04) (built on Ubuntu-22.04)
+- [Windows](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_windows-2022.exe)
+- [MacOS](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_macos-13-Intel.zip) (Intel)
+- [MacOS](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_macos-14-AppleSilicon.zip) (ARM)
+- [Linux](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_ubuntu-22.04) (built on Ubuntu-22.04)
+- [Linux](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_ubuntu-24.04) (built on Ubuntu-22.04)
 
 If the relevant EasyReflectometry installation does not work on your system, then please try installation from source. 
 
diff --git a/docs/src/conf.py b/docs/src/conf.py
index 0732ee30..da36a2c7 100644
--- a/docs/src/conf.py
+++ b/docs/src/conf.py
@@ -78,9 +78,9 @@
 # the built documents.
 #
 # The short X.Y version.
-version = '1.1.0'
+version = '1.1.1'
 # The full version, including alpha/beta/rc tags.
-release = '1.1.0'
+release = '1.1.1'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/src/installation.md b/docs/src/installation.md
index 0aabeea6..d0852aa6 100644
--- a/docs/src/installation.md
+++ b/docs/src/installation.md
@@ -1,11 +1,11 @@
 # Installation
 
 To make the installation of EasyReflectometry as easy as possible, we prepare packaged releases for three major operating systems:
-- [Windows](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_windows-2022.exe)
-- [MacOS (Intel)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_macos-13-Intel.zip)
-- [MacOS (Silicon)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_macos-14-AppleSilicon.zip)
-- [Linux (built on Ubuntu-24.04)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_ubuntu-22.04)
-- [Linux (built on Ubuntu-22.04)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.0/EasyReflectometryApp_v1.1.0_ubuntu-24.04)
+- [Windows](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_windows-2022.exe)
+- [MacOS (Intel)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_macos-13-Intel.zip)
+- [MacOS (Silicon)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_macos-14-AppleSilicon.zip)
+- [Linux (built on Ubuntu-24.04)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_ubuntu-22.04)
+- [Linux (built on Ubuntu-22.04)](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.1.1/EasyReflectometryApp_v1.1.1_ubuntu-24.04)
 
 If the relevant EasyReflectometry installation does not work on your system, then please try installation from source.
 
diff --git a/docs/src/tutorial.md b/docs/src/tutorial.md
index 850b66f6..0f942251 100644
--- a/docs/src/tutorial.md
+++ b/docs/src/tutorial.md
@@ -1,6 +1,6 @@
 # Getting started
 This is the tutorial for EasyReflectometryApp and how to use it.  
-Version: 1.1.0
+Version: 1.1.1
 
 ## Home page
 When opening up the EasyRecletometryApp you are presented with the **Home** page.  
diff --git a/pyproject.toml b/pyproject.toml
index 7ac6ad58..6be66552 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,8 +4,8 @@ build-backend = 'hatchling.build'
 
 [project]
 name = 'EasyReflectometryApp'
-version = '1.1.0'
-release_data = '01 May 2025'
+version = '1.1.1'
+release_data = '28 May 2025'
 description = "Making reflectometry data analysis and modelling easy."
 authors = [
     {name = "Andrew R. McCluskey"},