diff --git a/composer.json b/composer.json
index f291b3d..7393594 100644
--- a/composer.json
+++ b/composer.json
@@ -34,9 +34,9 @@
 		"php": ">=8.0.0",
 		"ext-dom": "*",
 		"ext-filter": "*",
-		"composer/installers": "^2|^1.0.12",
-		"mediawiki/bootstrap": "^4.5",
-		"jeroen/file-fetcher": "^6|^5|^4.4",
+		"composer/installers": "^2",
+		"mediawiki/bootstrap": "5.x-dev",
+		"jeroen/file-fetcher": "^6",
 		"psr/http-message": "^1"
 	},
 	"require-dev": {
diff --git a/skin.json b/skin.json
index 78a8fe7..61e8eff 100644
--- a/skin.json
+++ b/skin.json
@@ -8,18 +8,20 @@
 		"Morne Alberts",
 		"[https://www.EntropyWins.wtf/mediawiki Jeroen De Dauw]"
 	],
-	"version": "4.3.0",
+	"version": "5.0.0-dev",
 	"url": "https://www.mediawiki.org/wiki/Skin:Chameleon",
 	"descriptionmsg": "chameleon-desc",
 	"license-name": "GPL-3.0-or-later",
 	"requires": {
-		"MediaWiki": ">= 1.35.0",
+		"MediaWiki": ">= 1.39.0",
 		"extensions": {
-			"Bootstrap": "~4.5"
+			"Bootstrap": "~5.0"
 		}
 	},
 	"AutoloadNamespaces": {
-		"Skins\\Chameleon\\": "src/",
+		"Skins\\Chameleon\\": "src/"
+	},
+	"TestAutoloadNamespaces": {
 		"Skins\\Chameleon\\Tests\\": "tests/phpunit/"
 	},
 	"MessagesDirs": {