diff --git a/src/plugins/sib-reactions.js b/src/plugins/sib-reactions.js
index 598b09f0ca3373939b0412654d54c3adc9d2cd32..510620b1aa1382b21f0ad9f26f40843c1983bf74 100644
--- a/src/plugins/sib-reactions.js
+++ b/src/plugins/sib-reactions.js
@@ -222,7 +222,7 @@ converse.plugins.add('sib-reactions', {
         }
 
         const picker = new Picker();
-        picker.classList.add('emoji-reaction-select');
+        picker.classList.add('light', 'emoji-reaction-select');
 
         picker.addEventListener('emoji-click', e => {
           const emoji = e.detail.unicode;