diff --git a/lib/src/widgets/toolbar/buttons/quill_icon_button.dart b/lib/src/widgets/toolbar/buttons/quill_icon_button.dart
index f0031f17..6b4d53d2 100644
--- a/lib/src/widgets/toolbar/buttons/quill_icon_button.dart
+++ b/lib/src/widgets/toolbar/buttons/quill_icon_button.dart
@@ -24,12 +24,12 @@ class QuillToolbarIconButton extends StatelessWidget {
     if (isFilled) {
       return IconButton.filled(
         padding: padding,
-        constraints: BoxConstraints(),
+        constraints: const BoxConstraints(),
         onPressed: onPressed, icon: icon);
     }
     return IconButton(
       padding: padding,
-      constraints: BoxConstraints(),
+      constraints: const BoxConstraints(),
       onPressed: () {
         onPressed?.call();
         afterPressed?.call();