diff --git a/src/aiidalab_qe/common/widgets.py b/src/aiidalab_qe/common/widgets.py
index 20f14f549..c1917d6ab 100644
--- a/src/aiidalab_qe/common/widgets.py
+++ b/src/aiidalab_qe/common/widgets.py
@@ -1162,7 +1162,6 @@ def __init__(
                 role="button"
                 href="{link}"
                 target="{"_self" if in_place else "_blank"}"
-                class="jupyter-button widget-button {class_}"
                 style="cursor: default; width: fit-content; {style_}"
             >
         """
@@ -1174,7 +1173,9 @@ def __init__(
         self.value = html
 
         self.add_class("jupyter-button")
+        self.add_class("widget-button")
         self.add_class("link-button")
+        self.add_class(class_)
 
         self.disabled = disabled