diff --git a/src/panels/lovelace/editor/card-editor/hui-card-picker.ts b/src/panels/lovelace/editor/card-editor/hui-card-picker.ts
index 77a15e83f0..ba374c4539 100644
--- a/src/panels/lovelace/editor/card-editor/hui-card-picker.ts
+++ b/src/panels/lovelace/editor/card-editor/hui-card-picker.ts
@@ -183,7 +183,7 @@ export class HuiCardPicker extends LitElement {
         .preview {
           pointer-events: none;
           margin: 20px;
-          flex: 1 1 0;
+          flex-grow: 1;
           display: flex;
           align-items: center;
           justify-content: center;