diff --git a/panel/src/scss/components/_panel.scss b/panel/src/scss/components/_panel.scss
index ccb9ba9b..279a4458 100644
--- a/panel/src/scss/components/_panel.scss
+++ b/panel/src/scss/components/_panel.scss
@@ -32,6 +32,7 @@
     overflow: hidden;
     width: 48px;
     height: 48px;
+    flex: 0 0 48px;
     border-radius: $border-radius-round;
     background-color: var(--color-base-400);
     box-shadow: $box-shadow-sm;