diff --git a/qtc-net-server/Controllers/UsersController.cs b/qtc-net-server/Controllers/UsersController.cs
index cf39de7..6ed4edd 100644
--- a/qtc-net-server/Controllers/UsersController.cs
+++ b/qtc-net-server/Controllers/UsersController.cs
@@ -40,7 +40,7 @@ namespace qtc_api.Controllers
         {
             var user = new ServiceResponse<UserInformationDto>();
 
-            string recordId = $"User_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
+            string recordId = $"User_{id}_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
             user = await cache.GetRecordAsync<ServiceResponse<UserInformationDto>>(recordId);
 
             if (user == null)
@@ -101,7 +101,7 @@ namespace qtc_api.Controllers
                     var updatedUser = await _userService.UpdateUserInfo(user);
 
                     // always try to overwrite cache when updating user info
-                    string recordId = $"User_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
+                    string recordId = $"User_{user.Id}_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
                     await cache.SetRecordAsync(recordId, updatedUser);
 
                     return Ok(updatedUser);
@@ -136,7 +136,7 @@ namespace qtc_api.Controllers
                     var response = await _userService.UpdateUserPic(userId, file);
 
                     // always try to overwrite cache when updating pfp
-                    string recordId = $"UserPfp_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
+                    string recordId = $"UserPfp_{userId}_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
                     using(var stream = file.OpenReadStream())
                     {
                         using(var ms = new MemoryStream())
@@ -163,7 +163,7 @@ namespace qtc_api.Controllers
         [Authorize]
         public async Task<ActionResult> GetUserProfilePicture(string userId)
         {
-            string recordId = $"UserPfp_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
+            string recordId = $"UserPfp_{userId}_{DateTime.Now.ToString("yyyyMMdd_hhmm")}";
             byte[] pfpBytes = await cache.GetImageAsync(recordId);
 
             var result = new ServiceResponse<FileContentResult>();