diff --git a/package.json b/package.json
index 5254ae2..af38db5 100644
--- a/package.json
+++ b/package.json
@@ -1,5 +1,5 @@
 {
-    "version": "3.0.5",
+    "version": "3.0.6",
     "license": "Apache-2.0",
     "main": "dist/index.js",
     "typings": "dist/index.d.ts",
diff --git a/src/messaging/classes/HttpClient.ts b/src/messaging/classes/HttpClient.ts
index 9bbb1ee..08a5268 100644
--- a/src/messaging/classes/HttpClient.ts
+++ b/src/messaging/classes/HttpClient.ts
@@ -64,39 +64,38 @@ export abstract class HttpClient {
             config.headers['Accept-Charset'] = `utf-8`;
             config.headers['Accept'] = `application/json`;
             config.headers['Content-Type'] = `application/json`;
+            //config.headers['content-type'] = `application/json`;
         }
 
         if (config.url !== '/v2/oauth/token') {
             // check token validity
-            const access_token = await checkTokenValidity();
-
+            let access_token = await checkTokenValidity();
+                       
             if (access_token) {
-                config.headers['Authorization'] = `Bearer ${access_token}`;                
+                config.headers['Authorization'] = `Bearer ${access_token}`;                    
             } else {
                 // retrieve auth credentials
                 const authCredentials = await this.auth.getCredentials();
 
-                // request new token
-                const { access_token } = await this.renewToken(authCredentials);
-
+                // request new token                                
+                let renewed_token = await this.renewToken(authCredentials);                
                 // set token if valid
-                if (access_token) {
+                if (renewed_token) {
                     // set authorization headers
-                    config.headers['Authorization'] = `Bearer ${access_token}`;
+                    config.headers['Authorization'] = `Bearer ${renewed_token}`;                   
                     // set authorization token in storage
                     const futureTimeStamp = addMinutes(
                         new Date(),
                         Constants.TOKEN_EXPIRE_IN_50_MINS
                     );
                     await setAuthToken(
-                        access_token,
+                        renewed_token,
                         futureTimeStamp.toISOString()
                     );
                 }
             }
         }
 
-
         return config;
     };
 
@@ -132,16 +131,16 @@ export abstract class HttpClient {
             const authCredentials = await this.auth.getCredentials();
 
             // request new token
-            const { access_token } = await this.renewToken(authCredentials);
+            let renewed_token = await this.renewToken(authCredentials);
 
             // set token if valid
-            if (access_token) {
+            if (renewed_token) {
                 // set authorization token in storage
                 const futureTimeStamp = addMinutes(
                     new Date(),
                     Constants.TOKEN_EXPIRE_IN_50_MINS
                 );
-                await setAuthToken(access_token, futureTimeStamp.toISOString());
+                await setAuthToken(renewed_token, futureTimeStamp.toISOString());
 
                 return this.instance(
                     originalRequest as InternalAxiosRequestConfig
@@ -169,9 +168,7 @@ export abstract class HttpClient {
         return Promise.reject(error);
     };
 
-    private async renewToken(
-        authCredentials: AuthCredentials
-    ): Promise<{ access_token: string }> {
+    private async renewToken(authCredentials: AuthCredentials): Promise<string | null> {
         const params = new URLSearchParams();
         params.append('client_id', `${authCredentials.client_id}`);
         params.append('client_secret', `${authCredentials.client_secret}`);
@@ -180,10 +177,17 @@ export abstract class HttpClient {
             'scope',
             'free-trial-numbers:read free-trial-numbers:write messages:read messages:write virtual-numbers:read virtual-numbers:write reports:read reports:write'
         );
-
-        const auth = await this.instance.post(`/v2/oauth/token`, params);
-        if (!auth) return auth;
-        const { access_token } = auth;
-        return access_token;
+    
+        try {
+            const auth = await this.instance.post(`/v2/oauth/token`, params);
+    
+            if (auth && auth.access_token) {
+                return auth.access_token;
+            } else {
+                return null;
+            }
+        } catch (error) {
+            return null;
+        }
     }
 }
diff --git a/src/messaging/utils/config.ts b/src/messaging/utils/config.ts
index e4760ca..762510f 100644
--- a/src/messaging/utils/config.ts
+++ b/src/messaging/utils/config.ts
@@ -108,13 +108,20 @@ export const getAuthToken = async (): Promise<
 
 export const checkTokenValidity = async (): Promise<string | null> => {
     try {
-        const authData = await getAuthToken();
-        const { accessToken, timeExp } = authData as { accessToken: string; timeExp: string };
+        const authData = await getAuthToken();        
+  
+        if (authData) {
+            let { accessToken, timeExp } = authData as { accessToken: string; timeExp: string };
+            let timeExpTimestamp: number = 0;
+            if ((timeExp !== '') && (accessToken !== '')) {
+                timeExpTimestamp = Number(timeExp);
+            }
+            else {
+                return null;
+            } 
 
-        const timeExpTimestamp = Number(timeExp);
-        const currentTimeStamp = getTime(new Date());
+            const currentTimeStamp = getTime(new Date());
 
-        if (accessToken && timeExp) {
             if (currentTimeStamp < timeExpTimestamp) {
                 // Token is still valid
                 return accessToken;