diff --git a/VERSION b/VERSION
index 845639e..0ea3a94 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-0.1.4
+0.2.0
diff --git a/lib/application.py b/lib/application.py
index 4c69537..e3b65b6 100644
--- a/lib/application.py
+++ b/lib/application.py
@@ -1,8 +1,9 @@
 #!/usr/bin/env python3
 
 from gi import require_version
-require_version("Gtk", "3.0")
-from gi.repository import Gtk
+require_version("Gtk", "4.0")
+require_version("Adw", "1")
+from gi.repository import Gtk, Adw
 
 
 class AppWindow(Gtk.ApplicationWindow):
@@ -12,7 +13,7 @@ def __init__(self, app):
         self.set_title("Hello World")
 
 
-class Application(Gtk.Application):
+class Application(Adw.Application):
 
     def __init__(self):
         super().__init__()
diff --git a/linux/hello-world-gtk.spec b/linux/hello-world-gtk.spec
index 3b47ebb..1de2673 100644
--- a/linux/hello-world-gtk.spec
+++ b/linux/hello-world-gtk.spec
@@ -14,6 +14,13 @@ a = Analysis(
 		('../VERSION', '.'),
 		('hello-world-gtk.desktop', '.')
 	],
+	hooksconfig={
+		"gi": {
+			"module-versions": {
+				"Gtk": "4.0"
+			}
+		}
+	},
 	hiddenimports=[],
 	hookspath=[],
 	runtime_hooks=[],
diff --git a/macos/bootstrap.sh b/macos/bootstrap.sh
index 47b7b07..89c310d 100644
--- a/macos/bootstrap.sh
+++ b/macos/bootstrap.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
 
-brew install pygobject3 gtk+3 adwaita-icon-theme
+brew install pygobject3 gtk4 adwaita-icon-theme libadwaita
 
 echo "Done"
diff --git a/macos/hello-world-gtk.spec b/macos/hello-world-gtk.spec
index 57b1166..2e50c64 100644
--- a/macos/hello-world-gtk.spec
+++ b/macos/hello-world-gtk.spec
@@ -13,6 +13,13 @@ a = Analysis(
 		('../LICENSE', '.'),
 		('../VERSION', '.')
 	],
+	hooksconfig={
+		"gi": {
+			"module-versions": {
+				"Gtk": "4.0"
+			}
+		}
+	},
 	hiddenimports=[],
 	hookspath=[],
 	runtime_hooks=[],
diff --git a/requirements.txt b/requirements.txt
index ef376ca..d53b556 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1 @@
-pyinstaller
+git+https://github.com/pyinstaller/pyinstaller.git
diff --git a/windows/bootstrap.sh b/windows/bootstrap.sh
index ca09b2a..2bbc74a 100644
--- a/windows/bootstrap.sh
+++ b/windows/bootstrap.sh
@@ -2,6 +2,6 @@
 
 # This script is meant to be run through MinGW
 
-pacman -S --noconfirm mingw-w64-x86_64-gtk3 mingw-w64-x86_64-python-pip mingw-w64-x86_64-python3-gobject mingw-w64-x86_64-nsis mingw-w64-x86_64-nsis-nsisunz zip unzip
+pacman -S --noconfirm mingw-w64-x86_64-gtk4 mingw-w64-x86_64-python-pip mingw-w64-x86_64-python3-gobject mingw-w64-x86_64-libadwaita mingw-w64-x86_64-nsis mingw-w64-x86_64-nsis-nsisunz zip unzip
 
 echo "Done"
diff --git a/windows/hello-world-gtk.spec b/windows/hello-world-gtk.spec
index 5981394..5f3557d 100644
--- a/windows/hello-world-gtk.spec
+++ b/windows/hello-world-gtk.spec
@@ -13,6 +13,13 @@ a = Analysis(
 		('../LICENSE', '.'),
 		('../VERSION', '.')
 	],
+	hooksconfig={
+		"gi": {
+			"module-versions": {
+				"Gtk": "4.0"
+			}
+		}
+	},
 	hiddenimports=[],
 	hookspath=[],
 	runtime_hooks=[],