diff --git a/src/handlers/shttp.integration.test.ts b/src/handlers/shttp.integration.test.ts
index a7c6ec3..8ffea82 100644
--- a/src/handlers/shttp.integration.test.ts
+++ b/src/handlers/shttp.integration.test.ts
@@ -1,10 +1,10 @@
 import { jest } from '@jest/globals';
 import { Request, Response } from 'express';
-import { JSONRPCMessage } from '@modelcontextprotocol/sdk/types.js';
+import { JSONRPCMessage, JSONRPCResponse } from '@modelcontextprotocol/sdk/types.js';
 import { MockRedisClient, setRedisClient } from '../redis.js';
 import { handleStreamableHTTP } from './shttp.js';
 import { AuthInfo } from '@modelcontextprotocol/sdk/server/auth/types.js';
-import { randomUUID } from 'crypto';
+// import { randomUUID } from 'crypto'; // Currently unused but may be needed for future tests
 import { shutdownSession } from '../services/redisTransport.js';
 
 describe('Streamable HTTP Handler Integration Tests', () => {
@@ -147,7 +147,6 @@ describe('Streamable HTTP Handler Integration Tests', () => {
     });
 
     it('should handle cleanup errors gracefully', async () => {
-      const sessionId = randomUUID();
       const initRequest: JSONRPCMessage = {
         jsonrpc: '2.0',
         id: 'init-1',
@@ -176,7 +175,6 @@ describe('Streamable HTTP Handler Integration Tests', () => {
       )?.[1] as (() => Promise<void>) | undefined;
 
       // Simulate error during cleanup
-      const originalSimulateError = mockRedis.simulateError.bind(mockRedis);
       
       // Cleanup should not throw error even if Redis operations fail
       if (finishHandler) {
@@ -240,7 +238,7 @@ describe('Streamable HTTP Handler Integration Tests', () => {
       let sessionId: string | undefined;
       
       if (jsonCalls.length > 0) {
-        const response = jsonCalls[0][0] as any;
+        const response = jsonCalls[0][0] as JSONRPCResponse;
         if (response?.result?._meta?.sessionId) {
           sessionId = response.result._meta.sessionId;
         }
@@ -254,11 +252,11 @@ describe('Streamable HTTP Handler Integration Tests', () => {
             try {
               // SSE data format: "data: {...}\n\n"
               const jsonStr = data.replace(/^data: /, '').trim();
-              const parsed = JSON.parse(jsonStr) as any;
+              const parsed = JSON.parse(jsonStr) as JSONRPCResponse;
               if (parsed?.result?._meta?.sessionId) {
                 sessionId = parsed.result._meta.sessionId;
               }
-            } catch (e) {
+            } catch {
               // Not valid JSON, continue
             }
           }
@@ -344,7 +342,7 @@ describe('Streamable HTTP Handler Integration Tests', () => {
       // Check JSON responses
       const jsonCalls = (mockRes.json as jest.Mock).mock.calls;
       if (jsonCalls.length > 0) {
-        const response = jsonCalls[0][0] as any;
+        const response = jsonCalls[0][0] as JSONRPCResponse;
         if (response?.result?._meta?.sessionId) {
           sessionId = response.result._meta.sessionId;
         }
@@ -357,11 +355,13 @@ describe('Streamable HTTP Handler Integration Tests', () => {
           if (typeof data === 'string' && data.includes('sessionId')) {
             try {
               const jsonStr = data.replace(/^data: /, '').trim();
-              const parsed = JSON.parse(jsonStr) as any;
+              const parsed = JSON.parse(jsonStr) as JSONRPCResponse;
               if (parsed?.result?._meta?.sessionId) {
                 sessionId = parsed.result._meta.sessionId;
               }
-            } catch (e) {}
+            } catch {
+              // Ignore JSON parse errors
+            }
           }
         }
       }
@@ -442,7 +442,7 @@ describe('Streamable HTTP Handler Integration Tests', () => {
       // Check JSON responses
       const jsonCalls = (mockRes.json as jest.Mock).mock.calls;
       if (jsonCalls.length > 0) {
-        const response = jsonCalls[0][0] as any;
+        const response = jsonCalls[0][0] as JSONRPCResponse;
         if (response?.result?._meta?.sessionId) {
           actualSessionId = response.result._meta.sessionId;
         }
@@ -459,7 +459,9 @@ describe('Streamable HTTP Handler Integration Tests', () => {
               if (parsed?.result?._meta?.sessionId) {
                 actualSessionId = parsed.result._meta.sessionId;
               }
-            } catch (e) {}
+            } catch {
+              // Ignore JSON parse errors
+            }
           }
         }
       }
@@ -658,8 +660,7 @@ describe('Streamable HTTP Handler Integration Tests', () => {
         await finishHandler2();
       }
 
-      // Track session 2 ID
-      const session2Id = 'user2-session-id';
+      // Track session 2 ID (placeholder for actual implementation)
 
       // User 1 deletes their session
       jest.clearAllMocks();
diff --git a/src/services/redisTransport.integration.test.ts b/src/services/redisTransport.integration.test.ts
index a3e1672..3fcc778 100644
--- a/src/services/redisTransport.integration.test.ts
+++ b/src/services/redisTransport.integration.test.ts
@@ -4,8 +4,7 @@ import { MockRedisClient, setRedisClient } from '../redis.js';
 import { 
   ServerRedisTransport,
   redisRelayToMcpServer,
-  shutdownSession,
-  setSessionOwner
+  shutdownSession
 } from './redisTransport.js';
 import { createMcpServer } from './mcp.js';
 import { Transport } from '@modelcontextprotocol/sdk/shared/transport.js';
diff --git a/src/services/redisTransport.test.ts b/src/services/redisTransport.test.ts
index 0cfd3a5..60e7e33 100644
--- a/src/services/redisTransport.test.ts
+++ b/src/services/redisTransport.test.ts
@@ -12,7 +12,6 @@ import {
   isSessionOwnedBy
 } from './redisTransport.js';
 import { Transport } from '@modelcontextprotocol/sdk/shared/transport.js';
-import { createMcpServer } from './mcp.js';
 
 describe('Redis Transport', () => {
   let mockRedis: MockRedisClient;
diff --git a/src/services/redisTransport.ts b/src/services/redisTransport.ts
index d48f78e..e35eb9e 100644
--- a/src/services/redisTransport.ts
+++ b/src/services/redisTransport.ts
@@ -28,8 +28,8 @@ function sendToMcpServer(sessionId: string, message: JSONRPCMessage, extra?: { a
   logger.debug('Sending message to MCP server via Redis', {
     sessionId,
     channel: toServerChannel,
-    method: (message as any).method,
-    id: (message as any).id
+    method: ('method' in message ? message.method : undefined),
+    id: ('id' in message ? message.id : undefined)
   });
   
   const redisMessage: RedisMessage = { type: 'mcp', message, extra, options };
@@ -125,7 +125,7 @@ export async function redisRelayToMcpServer(sessionId: string, transport: Transp
         logger.debug('Relaying message from Redis to client', {
           sessionId,
           requestId,
-          method: (redisMessage.message as any).method
+          method: ('method' in redisMessage.message ? redisMessage.message.method : undefined)
         });
         await transport.send(redisMessage.message, redisMessage.options);
       }
@@ -148,7 +148,7 @@ export async function redisRelayToMcpServer(sessionId: string, transport: Transp
           logger.debug('Setting up response subscription', {
             sessionId,
             messageId: message.id,
-            method: (message as any).method
+            method: ('method' in message ? message.method : undefined)
           });
           await subscribe(message.id.toString());
         }
@@ -235,8 +235,8 @@ export class ServerRedisTransport implements Transport {
           
           logger.debug('Received MCP message from client', {
             sessionId: this._sessionId,
-            method: (redisMessage.message as any).method,
-            id: (redisMessage.message as any).id
+            method: ('method' in redisMessage.message ? redisMessage.message.method : undefined),
+            id: ('id' in redisMessage.message ? redisMessage.message.id : undefined)
           });
           
           this.onmessage?.(redisMessage.message, redisMessage.extra);
@@ -295,8 +295,8 @@ export class ServerRedisTransport implements Transport {
     logger.debug('Sending message to client', {
       sessionId: this._sessionId,
       channel,
-      method: (message as any).method,
-      id: (message as any).id,
+      method: ('method' in message ? message.method : undefined),
+      id: ('id' in message ? message.id : undefined),
       relatedRequestId
     });
 
diff --git a/src/utils/logger.ts b/src/utils/logger.ts
index 828ca92..f9879db 100644
--- a/src/utils/logger.ts
+++ b/src/utils/logger.ts
@@ -1,5 +1,5 @@
 import { AsyncLocalStorage } from 'async_hooks';
-import { Request } from 'express';
+import { Request, Response, NextFunction } from 'express';
 
 // Severity levels as per Google Cloud Logging
 export enum LogSeverity {
@@ -17,7 +17,11 @@ export enum LogSeverity {
 interface LogContext {
   trace?: string;
   spanId?: string;
-  [key: string]: any;
+  requestId?: string;
+  userAgent?: string;
+  method?: string;
+  path?: string;
+  [key: string]: string | undefined;
 }
 
 interface StructuredLogEntry {
@@ -26,7 +30,7 @@ interface StructuredLogEntry {
   timestamp: string;
   'logging.googleapis.com/trace'?: string;
   'logging.googleapis.com/spanId'?: string;
-  [key: string]: any;
+  [key: string]: unknown;
 }
 
 class StructuredLogger {
@@ -73,7 +77,7 @@ class StructuredLogger {
    * Create Express middleware for request context
    */
   middleware() {
-    return (req: Request, res: any, next: any) => {
+    return (req: Request, res: Response, next: NextFunction) => {
       const context = this.extractTraceContext(req);
       this.runWithContext(context, () => {
         next();
@@ -84,7 +88,7 @@ class StructuredLogger {
   /**
    * Log a structured message
    */
-  private log(severity: LogSeverity, message: string, metadata?: Record<string, any>) {
+  private log(severity: LogSeverity, message: string, metadata?: Record<string, unknown>) {
     const context = this.asyncLocalStorage.getStore() || {};
     
     const entry: StructuredLogEntry = {
@@ -114,23 +118,23 @@ class StructuredLogger {
   }
 
   // Convenience methods for different severity levels
-  debug(message: string, metadata?: Record<string, any>) {
+  debug(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.DEBUG, message, metadata);
   }
 
-  info(message: string, metadata?: Record<string, any>) {
+  info(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.INFO, message, metadata);
   }
 
-  notice(message: string, metadata?: Record<string, any>) {
+  notice(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.NOTICE, message, metadata);
   }
 
-  warning(message: string, metadata?: Record<string, any>) {
+  warning(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.WARNING, message, metadata);
   }
 
-  error(message: string, error?: Error, metadata?: Record<string, any>) {
+  error(message: string, error?: Error, metadata?: Record<string, unknown>) {
     const errorMetadata = {
       ...metadata,
       error: error ? {
@@ -142,15 +146,15 @@ class StructuredLogger {
     this.log(LogSeverity.ERROR, message, errorMetadata);
   }
 
-  critical(message: string, metadata?: Record<string, any>) {
+  critical(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.CRITICAL, message, metadata);
   }
 
-  alert(message: string, metadata?: Record<string, any>) {
+  alert(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.ALERT, message, metadata);
   }
 
-  emergency(message: string, metadata?: Record<string, any>) {
+  emergency(message: string, metadata?: Record<string, unknown>) {
     this.log(LogSeverity.EMERGENCY, message, metadata);
   }