diff --git a/schemas/richcaptionproperties.yaml b/schemas/richcaptionproperties.yaml
index 4122efd..0a5a7d7 100644
--- a/schemas/richcaptionproperties.yaml
+++ b/schemas/richcaptionproperties.yaml
@@ -132,6 +132,14 @@ RichCaptionFont:
         The weight of the font. Can be a number (100-900) or a string ('normal', 'bold', etc.).
         100 is lightest, 900 is heaviest (boldest).
       default: "400"
+    style:
+      description: The font style.
+      type: string
+      enum:
+        - normal
+        - italic
+      default: "normal"
+      example: "italic"
     color:
       description: The text color using hexadecimal color notation.
       type: string
diff --git a/schemas/richtextproperties.yaml b/schemas/richtextproperties.yaml
index caa8773..8562f5d 100644
--- a/schemas/richtextproperties.yaml
+++ b/schemas/richtextproperties.yaml
@@ -19,6 +19,14 @@ RichTextFont:
         The weight of the font. Can be a number (100-900) or a string ('normal', 'bold', etc.).
         100 is lightest, 900 is heaviest (boldest).
       default: "400"
+    style:
+      description: The font style.
+      type: string
+      enum:
+        - normal
+        - italic
+      default: "normal"
+      example: "italic"
     color:
       description: The text color using hexadecimal color notation.
       type: string
diff --git a/tests/smoke.cjs b/tests/smoke.cjs
index 118a02c..160c823 100644
--- a/tests/smoke.cjs
+++ b/tests/smoke.cjs
@@ -120,6 +120,25 @@ async function run() {
     });
   });
 
+  check("Parse rich-text font style italic", () => {
+    const result = zodCjs.richTextAssetSchema.parse({
+      type: "rich-text",
+      text: "Hello world",
+      font: { style: "italic" },
+    });
+    assert.strictEqual(result.font.style, "italic");
+  });
+
+  check("Reject unsupported rich-text font style", () => {
+    assert.throws(() => {
+      zodCjs.richTextAssetSchema.parse({
+        type: "rich-text",
+        text: "Hello world",
+        font: { style: "oblique" },
+      });
+    });
+  });
+
   check("Parse valid svg asset", () => {
     const result = zodCjs.svgAssetSchema.parse({
       type: "svg",
@@ -148,6 +167,25 @@ async function run() {
     });
   });
 
+  check("Parse rich-caption font style italic", () => {
+    const result = zodCjs.richCaptionAssetSchema.parse({
+      type: "rich-caption",
+      src: "https://example.com/captions.srt",
+      font: { style: "italic" },
+    });
+    assert.strictEqual(result.font.style, "italic");
+  });
+
+  check("Reject unsupported rich-caption font style", () => {
+    assert.throws(() => {
+      zodCjs.richCaptionAssetSchema.parse({
+        type: "rich-caption",
+        src: "https://example.com/captions.srt",
+        font: { style: "oblique" },
+      });
+    });
+  });
+
   console.log("\n--- Unified asset schema: existing shape (regression guard) ---\n");
 
   check("Parse imageAsset with src only (existing shape)", () => {