diff --git a/controllers/project.controller.js b/controllers/project.controller.js
index e59488c..d226f93 100644
--- a/controllers/project.controller.js
+++ b/controllers/project.controller.js
@@ -195,72 +195,59 @@ export async function projectDashboard(req, res) {
 }
 
 export async function updateCollaborator(req, res) {
-  try {
-    let project = await Project.findById(req.params.projectId).populate(
-      'owner',
-      'name email',
-    );
-    let is_owner = String(project.owner._id) === String(req.user._id);
-    if (!is_owner) {
-      response_401('The user is not the owner of project.');
-    } else {
-      //storing emails we got in an array
-      const emails = req.body.collaborators;
+     try {
+      let project=await Project.findOne({ projectId: req.params.projectId }).populate('owner', 'name email')
+      let is_owner = String(project.owner._id) === String(req.user._id);
+      if(!is_owner){
+        response_401('The user is not the owner of project.');
+      }else{
+        //storing emails we got in an array
+        const emails=req.body.collaborators;
+
+        // finding all collaborators with projectId
+        const projectCollaborators=await Collaborators.find({projectId:req.params.projectId});
+
+        //store emails of every collaborator in an array
+        const collaboratorsEmails=await projectCollaborators.map((projectCollaborator)=>(projectCollaborator.email))
+
+        //Array of promises to send invitation mails
+        let sendMailsPromise;
+
+        //iterating on every email we got
+        emails.forEach(async (email)=>{
+          //check this email is present in array of collaborators list of this project
+          const isPresent= collaboratorsEmails.includes(email);
+          if(!isPresent){
+            // creating collaborator in db
+            let newcollaborator=await Collaborators.create({
+              email:email,
+              projectId:req.params.projectId,
+              status:'Invited'
+            });
+
+            //Invite new Collaborator with this email
+            sendMailsPromise.push(sendCollabInvitationLink(newcollaborator.email,newcollaborator._id,project.name));
+            
+          }
+        })
+
+        //send mails
+       await Promise.all(sendMailsPromise);
+
+        //checking if any removed collaborators and deleting
+        collaboratorsEmails.forEach(async (collaboratorEmail)=>{
+          const isPresent= emails.includes(collaboratorEmail);
+          if(!isPresent){
+            await Collaborators.findOneAndDelete({
+              email:collaboratorEmail,
+              projectId:req.params.projectId
+            })
+          }
+        })
 
-      // finding all collaborators with projectId
-      const projectCollaborators = await Collaborators.find({
-        projectId: req.params.projectId,
-      });
-
-      //store emails of every collaborator in an array
-      const collaboratorsEmails = await projectCollaborators.map(
-        (projectCollaborator) => projectCollaborator.email,
-      );
-
-      //iterating on every email we got
-      emails.forEach(async (email) => {
-        //check this email is present in array of collaborators list of this project
-        const isPresent = collaboratorsEmails.includes(email);
-        if (!isPresent) {
-          //Invite new Collaborator with this email
-
-          // creating collaborator in db
-          await Collaborators.create({
-            email: email,
-            projectId: req.params.projectId,
-            status: 'Invited',
-          });
-        }
-      });
-
-      //checking if any removed collaborators and deleting
-      collaboratorsEmails.forEach(async (collaboratorEmail) => {
-        const isPresent = emails.includes(collaboratorEmail);
-        if (!isPresent) {
-          await Collaborators.findOneAndDelete({
-            email: collaboratorEmail,
-            projectId: req.params.projectId,
-          });
-        }
-      });
-    }
-  } catch (error) {
-    console.log(error);
-    return response_500(res, 'Server error', error);
-  }
-}
-
-function inviteCollaborators(
-  email,
-  projectId,
-  projectName,
-  userName,
-  userEmail,
-) {
-  const obj = {
-    projectId,
-    collaborators: email.join(';'),
-  };
-  const secret = getJwt(obj);
-  sendCollabInvitationLink(email, secret, projectName, userName, userEmail);
-}
+      }
+     } catch (error) {
+      console.log(error);
+      return response_500(res, 'Server error', error);
+     }
+}
\ No newline at end of file
diff --git a/templates/collaborator.handlebars b/templates/collaborator.handlebars
index bab0c6a..260bf90 100644
--- a/templates/collaborator.handlebars
+++ b/templates/collaborator.handlebars
@@ -151,7 +151,7 @@
         <h5 class="card-title">Invitation to project {projectName}</h5>
         <p class="card-text">
           You have been invited to the project{projectName} by
-          <a href="mailto://{userEmail}" style="color: #006dfb">{userName}</a>.
+          <a href="mailto://{userEmail}" style="color: #006dfb">{userEmail}</a>.
           Kindly click on the following link !
         </p>
         <a href="{{url}}" class="c ard-link">
diff --git a/utils/mailer.js b/utils/mailer.js
index 3df37d5..2c542ae 100644
--- a/utils/mailer.js
+++ b/utils/mailer.js
@@ -67,9 +67,7 @@ export function sendVerificationLink(email, secret, ip) {
 export function sendCollabInvitationLink(
   email,
   secret,
-  projectName,
-  userName,
-  userEmail,
+  projectName
 ) {
   let link = BASE_URL + '/collab/' + secret;
   const handlebarOptions = {
@@ -88,8 +86,7 @@ export function sendCollabInvitationLink(
     context: {
       url: link,
       projectName,
-      userName,
-      userEmail,
+      userEmail:email
     },
   };
   transporter.sendMail(mailOptions, (err, info) => {