diff --git a/extension.json b/extension.json
index 7fd3e8bf..e9ac2dda 100644
--- a/extension.json
+++ b/extension.json
@@ -11,7 +11,7 @@
 	"url": "https://www.mediawiki.org/wiki/Extension:InputBox",
 	"descriptionmsg": "inputbox-desc",
 	"requires": {
-		"MediaWiki": ">= 1.38.0"
+		"MediaWiki": ">= 1.41.0"
 	},
 	"license-name": "MIT",
 	"type": "parserhook",
diff --git a/resources/ext.inputBox.styles.less b/resources/ext.inputBox.styles.less
index 1bdab5a3..74aff9dc 100644
--- a/resources/ext.inputBox.styles.less
+++ b/resources/ext.inputBox.styles.less
@@ -1,4 +1,4 @@
-@import 'mediawiki.ui/variables.less';
+@import 'mediawiki.skin.variables.less';
 
 .mw-inputbox-centered {
 	margin-left: auto;
@@ -21,8 +21,8 @@
 
 .mw-inputbox-createbox:required:invalid ~ .mw-ui-button {
 	// appear like .mw-ui-input:disabled
-	background-color: @colorGray12;
-	color: @color-base--inverted;
-	border-color: @colorGray12;
-	cursor: default;
+	background-color: @background-color-disabled;
+	color: @color-inverted;
+	border-color: @border-color-disabled;
+	cursor: @cursor-base--disabled;
 }