diff --git a/internal/roadmap_agent.py b/internal/roadmap_agent.py
index 7c65585..4a119fb 100644
--- a/internal/roadmap_agent.py
+++ b/internal/roadmap_agent.py
@@ -301,9 +301,30 @@ def generate_roadmap(user_input: Dict[str, Any], courses: List[Dict[str, Any]])
   workflow = create_roadmap_workflow()
   final_state = workflow.invoke(initial_state)
   
+  # Post process - Update the validated roadmap with filtered courses
+  filtered_courses, total_duration = validated_roadmap_course(courses, final_state["validated_roadmap"]['validated_roadmap']["recommended_courses"])
+  final_state["validated_roadmap"]['validated_roadmap']["recommended_courses"] = filtered_courses
+  final_state["validated_roadmap"]['validated_roadmap']["total_duration"] = total_duration
   # Extract roadmap from the final state
   return final_state["validated_roadmap"]
 
+def validated_roadmap_course(courses: List[Any], validated_roadmap: List[Dict[str, Any]]) -> List[Dict[str, Any]]:
+    # Extract valid course IDs from the courses list
+    valid_course_ids = {course.id for course in courses}
+
+    # Track seen IDs to ensure only the first occurrence is added, also update new total_duration
+    seen_ids = set()
+    unique_courses = []
+    total_duration = 0
+
+    for course in validated_roadmap:
+        if course["id"] in valid_course_ids and course["id"] not in seen_ids:
+            unique_courses.append(course)
+            seen_ids.add(course["id"])
+            total_duration += course["duration"]
+
+    return unique_courses, total_duration
+
 # -- Example --
 # # for test llm
 # from utils.mock_data import MockDataGenerator