diff --git a/app/assets/stylesheets/popup.css b/app/assets/stylesheets/popup.css
index eda286eea..a1482b905 100644
--- a/app/assets/stylesheets/popup.css
+++ b/app/assets/stylesheets/popup.css
@@ -20,6 +20,11 @@
       max-inline-size: 100%;
       position: relative;
       z-index: 5;
+
+      .popup {
+        min-inline-size: 40ch;
+        max-inline-size: 40ch;
+      }
     }
   }