diff --git a/SECURITY_REPORT.md b/SECURITY_REPORT.md
index fe47150..1b788f8 100644
--- a/SECURITY_REPORT.md
+++ b/SECURITY_REPORT.md
@@ -64,10 +64,18 @@ Security analysis completed on February 1, 2026 for the Multi-Tenant POP3 Forwar
 ### 6. Dependency Security ✅
 
 - **Pinned Versions**: All dependencies use specific versions
-- **Known Vulnerabilities**: No known vulnerabilities in dependencies
+- **Security Patches**: All dependencies updated to patched versions
+- **No Known Vulnerabilities**: All reported vulnerabilities fixed
 - **Regular Updates**: Requirements can be easily updated
 - **Minimal Dependencies**: Only necessary packages included
 
+**Recent Security Updates (2026-02-01):**
+- `aiohttp`: 3.9.1 → 3.13.3 (Fixed zip bomb, DoS, directory traversal)
+- `authlib`: 1.3.0 → 1.6.5 (Fixed algorithm confusion, DoS, JWT issues)
+- `cryptography`: 42.0.0 → 42.0.4 (Fixed NULL pointer dereference)
+- `fastapi`: 0.109.0 → 0.109.1 (Fixed ReDoS vulnerability)
+- `python-multipart`: 0.0.6 → 0.0.22 (Fixed arbitrary file write, DoS, ReDoS)
+
 **Implementation**: `backend/requirements.txt`
 
 ## Security Best Practices Applied
diff --git a/backend/requirements.txt b/backend/requirements.txt
index cf46cfa..f8cb5eb 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -1,5 +1,5 @@
 # Core Framework
-fastapi==0.109.0
+fastapi==0.109.1  # Updated: Fixed ReDoS vulnerability (was 0.109.0)
 uvicorn[standard]==0.27.0
 pydantic==2.5.3
 pydantic-settings==2.1.0
@@ -13,8 +13,8 @@ asyncpg==0.29.0
 # Authentication
 python-jose[cryptography]==3.3.0
 passlib[bcrypt]==1.7.4
-python-multipart==0.0.6
-authlib==1.3.0
+python-multipart==0.0.22  # Updated: Fixed multiple vulnerabilities (was 0.0.6)
+authlib==1.6.5  # Updated: Fixed algorithm confusion and DoS vulnerabilities (was 1.3.0)
 httpx==0.26.0
 
 # Payment Processing
@@ -22,7 +22,7 @@ stripe==7.11.0
 
 # Email & Mail Processing
 aiosmtplib==3.0.1
-aiohttp==3.9.1
+aiohttp==3.13.3  # Updated: Fixed zip bomb, DoS, and directory traversal vulnerabilities (was 3.9.1)
 aioimaplib==1.0.1
 email-validator==2.1.0.post1
 
@@ -31,7 +31,7 @@ celery==5.3.6
 redis==5.0.1
 
 # Security & Encryption
-cryptography==42.0.0
+cryptography==42.0.4  # Updated: Fixed NULL pointer dereference (was 42.0.0)
 
 # Notifications
 apprise==1.7.1