diff --git a/src/generation/service.py b/src/generation/service.py
index cd23032..c5bf6ab 100644
--- a/src/generation/service.py
+++ b/src/generation/service.py
@@ -24,6 +24,9 @@ class GenerationError(Exception):
 class ContentGenerationService:
     """Service for AI-powered content generation with validation"""
     
+    MAX_H2_TOTAL = 5
+    MAX_H3_TOTAL = 13
+    
     def __init__(
         self,
         session: Session,
@@ -189,6 +192,9 @@ class ContentGenerationService:
             h2_total = int(h2_total)
             h3_total = int(h3_total)
         
+        h2_total = min(h2_total, self.MAX_H2_TOTAL)
+        h3_total = min(h3_total, self.MAX_H3_TOTAL)
+        
         prompt = prompt_template["user_template"].format(
             title=title,
             main_keyword=project.main_keyword,