diff --git a/demo/51-character-styles.ts b/demo/51-character-styles.ts
index 3230a7c86f..a6064a4ddc 100644
--- a/demo/51-character-styles.ts
+++ b/demo/51-character-styles.ts
@@ -15,6 +15,14 @@ const doc = new Document({
                     italics: true,
                 },
             },
+            {
+                id: "strong",
+                name: "Strong",
+                basedOn: "Normal",
+                run: {
+                    bold: true,
+                },
+            },
         ],
     },
 });
@@ -29,6 +37,18 @@ doc.addSection({
                 }),
             ],
         }),
+        new Paragraph({
+            children: [
+                new TextRun({
+                    text: "First Word",
+                    style: "strong",
+                }),
+                new TextRun({
+                    text:
+                        " - Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat.",
+                }),
+            ],
+        }),
     ],
 });