diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3ed9bc3c..0b7fb8d8 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,11 @@
-# Version 1.1.1 (28 May 2025)
+# Version 1.2.0 (1 March 2026)
 
-Fixed Apple Silicon installer.
-Fixed experimental data file parser.
+Added ORSO file parser
+Added simple constraints
+Added model-model constraints
+Enabled multi-sample display
+Enabled multi-experiment display
+Improved plotting
+Enhanced status bar display
+Moved SLD plot to main display
 
diff --git a/EasyReflectometryApp/__version__.py b/EasyReflectometryApp/__version__.py
index b3ddbc41..58d478ab 100644
--- a/EasyReflectometryApp/__version__.py
+++ b/EasyReflectometryApp/__version__.py
@@ -1 +1 @@
-__version__ = '1.1.1'
+__version__ = '1.2.0'
diff --git a/INSTALLATION.md b/INSTALLATION.md
index d11b5325..39b9a173 100644
--- a/INSTALLATION.md
+++ b/INSTALLATION.md
@@ -2,10 +2,10 @@
 
 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/v1.1.1/EasyReflectometryApp_v1.1.1_windows-2022.exe)
-- [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)
+- [Windows](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.2.0/EasyReflectometryApp_v1.2.0_windows-2022.exe)
+- [MacOS](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.2.0/EasyReflectometryApp_v1.2.0_macos-14-AppleSilicon.zip) (ARM)
+- [Linux](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.2.0/EasyReflectometryApp_v1.2.0_ubuntu-22.04) (built on Ubuntu-22.04)
+- [Linux](https://github.com/EasyScience/EasyReflectometryApp/releases/download/v1.2.0/EasyReflectometryApp_v1.2.0_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 da36a2c7..5d524c6d 100644
--- a/docs/src/conf.py
+++ b/docs/src/conf.py
@@ -78,9 +78,9 @@
 # the built documents.
 #
 # The short X.Y version.
-version = '1.1.1'
+version = '1.2.0'
 # The full version, including alpha/beta/rc tags.
-release = '1.1.1'
+release = '1.2.0'
 
 # The language for content autogenerated by Sphinx. Refer to documentation
 # for a list of supported languages.
diff --git a/docs/src/tutorial.md b/docs/src/tutorial.md
index 0f942251..a0c1d75e 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: 1.1.1
+Version: 1.2.0
 
 ## Home page
 When opening up the EasyRecletometryApp you are presented with the **Home** page.  
diff --git a/pyproject.toml b/pyproject.toml
index 22977614..8d16af39 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = 'hatchling.build'
 
 [project]
 name = 'EasyReflectometryApp'
-version = '1.1.1'
+version = '1.2.0'
 release_data = '28 May 2025'
 description = "Making reflectometry data analysis and modelling easy."
 authors = [