diff --git a/src/pages/overall/overall-course/course-head/course-head.vue b/src/pages/overall/overall-course/course-head/course-head.vue
index 45300b2..612db0a 100644
--- a/src/pages/overall/overall-course/course-head/course-head.vue
+++ b/src/pages/overall/overall-course/course-head/course-head.vue
@@ -72,7 +72,7 @@
 
             <span slot="footer" class="dialog-footer">
                 <el-button @click="ratingDialog = false" :disabled="ratingPosting">Cancel</el-button>
-                <el-button type="primary" @click="submitRating()" :disabled="ratingPosting">
+                <el-button type="primary" @click="submitRating()" :disabled="canSubmit">
                     {{course.rated ? 'Update' : 'Submit'}}
                 </el-button>
             </span>
@@ -100,6 +100,11 @@
         ratingPosting = false;
         rating = this.course.rating;
 
+        get canSubmit()
+        {
+            return this.ratingPosting || App.instance.demoMode
+        }
+
         /**
          * Redirect to the course page
          */