diff --git a/backend/microservices/readme.md b/backend/microservices/readme.md
index d2c7821..4d774f0 100644
--- a/backend/microservices/readme.md
+++ b/backend/microservices/readme.md
@@ -133,7 +133,7 @@ services:
 ```
 ### 🚀 Solution
 Enforce the "Database per Service" pattern. Services must never share a single database or directly query another service's tables. Ensure independent scaling, deployment, and technology choices per domain.
-## 🚀 3. Reliability Optimization
+## 🛡️ 3. Reliability Optimization
 
 ### Resilience Patterns
 ### ❌ Bad Practice
diff --git a/backend/nodejs/readme.md b/backend/nodejs/readme.md
index bc898fe..459eb26 100644
--- a/backend/nodejs/readme.md
+++ b/backend/nodejs/readme.md
@@ -226,7 +226,7 @@ const user = await db.query('SELECT * FROM users WHERE email = $1', [value.email
 ### 🚀 Solution
 Never trust external data. Validate input strictly using schema definitions and always utilize parameterized queries or an ORM to prevent SQL/NoSQL Injection attacks.
 
-## 9. 🚀 Utilizing Worker Threads for Heavy Tasks
+## 9. ⚡ Utilizing Worker Threads for Heavy Tasks
 
 ### ❌ Bad Practice
 ```javascript
diff --git a/backend/postgresql/readme.md b/backend/postgresql/readme.md
index 428615a..63fb850 100644
--- a/backend/postgresql/readme.md
+++ b/backend/postgresql/readme.md
@@ -105,7 +105,7 @@ REVOKE DROP ON ALL TABLES IN SCHEMA public FROM app_user;
 ```
 ### 🚀 Solution
 Enforce the Principle of Least Privilege (PoLP). Create specific, restricted database roles for application services. Implement Row-Level Security (RLS) for multi-tenant applications to isolate data strictly at the database layer.
-## 🚀 3. Performance Optimization
+## ⚡ 3. Performance Optimization
 
 ### Indexing Strategies
 ### ❌ Bad Practice
diff --git a/backend/redis/readme.md b/backend/redis/readme.md
index 4e94a9a..12de879 100644
--- a/backend/redis/readme.md
+++ b/backend/redis/readme.md
@@ -116,7 +116,7 @@ const redisClient = redis.createClient({
 ```
 ### 🚀 Solution
 Mandate TLS (Transport Layer Security) for encrypting all data in transit, ensuring that even if the internal network is compromised, the Redis traffic remains secure.
-## 🚀 3. Performance Optimization
+## ⚡ 3. Performance Optimization
 
 ### Command Usage
 ### ❌ Bad Practice