diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1500c9ffa..2a25ab026 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -3,7 +3,7 @@ cmake_minimum_required(VERSION 3.10.2 FATAL_ERROR)
 #============================================================================
 # Initialize the project
 #============================================================================
-project(gz-gui8 VERSION 8.0.0)
+project(gz-gui9 VERSION 9.0.0)
 
 #============================================================================
 # Find gz-cmake
diff --git a/Changelog.md b/Changelog.md
index 0c6a42cb8..4aff88aa6 100644
--- a/Changelog.md
+++ b/Changelog.md
@@ -1,3 +1,7 @@
+## Gazebo GUI 9
+
+### Gazebo GUI 9.0.0 (2023-XX-XX)
+
 ## Gazebo GUI 8
 
 ### Gazebo GUI 8.0.0 (2023-09-29)
diff --git a/README.md b/README.md
index 4db88fa43..09da13f63 100644
--- a/README.md
+++ b/README.md
@@ -50,12 +50,12 @@ which can be used to add custom widgets.
 
 # Install
 
-See the [installation tutorial](https://gazebosim.org/api/gui/8/install.html).
+See the [installation tutorial](https://gazebosim.org/api/gui/9/install.html).
 
 # Usage
 
 Take a look at the
-[tutorials](https://gazebosim.org/api/gui/8/tutorials.html)
+[tutorials](https://gazebosim.org/api/gui/9/tutorials.html)
 for usage instructions and API documentation.
 
 ## Known issue of command line tools
diff --git a/examples/plugin/custom_context_menu/CMakeLists.txt b/examples/plugin/custom_context_menu/CMakeLists.txt
index a93ab1fa8..a0a2a67a1 100644
--- a/examples/plugin/custom_context_menu/CMakeLists.txt
+++ b/examples/plugin/custom_context_menu/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")
 
diff --git a/examples/plugin/dialog_from_plugin/CMakeLists.txt b/examples/plugin/dialog_from_plugin/CMakeLists.txt
index 00ee5b212..038238de1 100644
--- a/examples/plugin/dialog_from_plugin/CMakeLists.txt
+++ b/examples/plugin/dialog_from_plugin/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")
 
diff --git a/examples/plugin/gz_components/CMakeLists.txt b/examples/plugin/gz_components/CMakeLists.txt
index c6e8b7153..24cc05cfc 100644
--- a/examples/plugin/gz_components/CMakeLists.txt
+++ b/examples/plugin/gz_components/CMakeLists.txt
@@ -16,8 +16,8 @@ find_package (Qt5
   REQUIRED
 )
 
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")
 
diff --git a/examples/plugin/hello_plugin/CMakeLists.txt b/examples/plugin/hello_plugin/CMakeLists.txt
index 8a2af6515..ea9c4dc85 100644
--- a/examples/plugin/hello_plugin/CMakeLists.txt
+++ b/examples/plugin/hello_plugin/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")
 
diff --git a/examples/plugin/multiple_qml/CMakeLists.txt b/examples/plugin/multiple_qml/CMakeLists.txt
index b4d2ea216..269f41cd7 100644
--- a/examples/plugin/multiple_qml/CMakeLists.txt
+++ b/examples/plugin/multiple_qml/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")
 
diff --git a/examples/standalone/custom_drawer/CMakeLists.txt b/examples/standalone/custom_drawer/CMakeLists.txt
index c5374e775..7765a7ebd 100644
--- a/examples/standalone/custom_drawer/CMakeLists.txt
+++ b/examples/standalone/custom_drawer/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 QT5_ADD_RESOURCES(resources_RCC custom_drawer.qrc)
 
diff --git a/examples/standalone/dialogs/CMakeLists.txt b/examples/standalone/dialogs/CMakeLists.txt
index 51753038d..54c146035 100644
--- a/examples/standalone/dialogs/CMakeLists.txt
+++ b/examples/standalone/dialogs/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")
 
diff --git a/examples/standalone/start_dialog/CMakeLists.txt b/examples/standalone/start_dialog/CMakeLists.txt
index fe69d465b..18b927982 100644
--- a/examples/standalone/start_dialog/CMakeLists.txt
+++ b/examples/standalone/start_dialog/CMakeLists.txt
@@ -8,8 +8,8 @@ endif()
 
 set(CMAKE_AUTOMOC ON)
 
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set(EXEC_NAME "start_dialog")
 
diff --git a/examples/standalone/window/CMakeLists.txt b/examples/standalone/window/CMakeLists.txt
index 98589a47d..710ee91f6 100644
--- a/examples/standalone/window/CMakeLists.txt
+++ b/examples/standalone/window/CMakeLists.txt
@@ -18,8 +18,8 @@ find_package (Qt5
 )
 
 # Find the Gazebo GUI library
-find_package(gz-gui8 REQUIRED)
-set(GZ_GUI_VER ${gz-gui8_VERSION_MAJOR})
+find_package(gz-gui9 REQUIRED)
+set(GZ_GUI_VER ${gz-gui9_VERSION_MAJOR})
 
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${GZ-GUI_CXX_FLAGS}")