diff --git a/src/lib/actions/lesson-actions.ts b/src/lib/actions/lesson-actions.ts
index df419b5..1496123 100644
--- a/src/lib/actions/lesson-actions.ts
+++ b/src/lib/actions/lesson-actions.ts
@@ -22,15 +22,20 @@ export async function saveLesson(
   }
 ) {
   await requireAdmin();
-  await prisma.lesson.update({
-    where: { id: lessonId },
-    data: {
-      title: data.title,
-      kinescopeId: data.kinescopeId || null,
-      content: data.content,
-      published: data.published,
-    },
-  });
+  try {
+    await prisma.lesson.update({
+      where: { id: lessonId },
+      data: {
+        title: data.title,
+        kinescopeId: data.kinescopeId || null,
+        content: JSON.parse(JSON.stringify(data.content)),
+        published: data.published,
+      },
+    });
+  } catch (err) {
+    console.error("[saveLesson] full error:", err);
+    throw err;
+  }
   revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}`);
   revalidatePath(`/admin/courses/${courseId}/modules/${moduleId}/lessons/${lessonId}`);
 }