diff --git a/src/controllers/admin/admin_users_controller.rs b/src/controllers/admin/admin_users_controller.rs
index 3d2b474..621c911 100644
--- a/src/controllers/admin/admin_users_controller.rs
+++ b/src/controllers/admin/admin_users_controller.rs
@@ -5,8 +5,10 @@
 use crate::api_data::admin::admin_search_user_result_api::AdminSearchUserResult;
 use crate::api_data::admin::admin_user_info_api::AdminUserInfoAPI;
 use crate::constants::admin::AdminRole;
+use crate::data::admin_action_log::AdminAction;
 use crate::data::base_request_handler::BaseRequestHandler;
 use crate::data::http_request_handler::HttpRequestHandler;
+use crate::helpers::admin_log_helper::log_admin_action;
 use crate::helpers::user_helper;
 use crate::routes::RequestResult;
 
@@ -29,5 +31,8 @@ pub fn get_single(r: &mut HttpRequestHandler) -> RequestResult {
     let user_id = r.post_user_id("user_id")?;
     let user = user_helper::find_user_by_id(&user_id)?;
 
+    log_admin_action(r.admin_id()?, &r.remote_ip(),
+                     AdminAction::AccessUserPage { user_id, user_name: user.full_name() })?;
+
     r.set_response(AdminUserInfoAPI::new(user))
 }
\ No newline at end of file
diff --git a/src/data/admin_action_log.rs b/src/data/admin_action_log.rs
index 9bde05b..3008460 100644
--- a/src/data/admin_action_log.rs
+++ b/src/data/admin_action_log.rs
@@ -1,6 +1,7 @@
 //! # Admin action log
 
 use crate::data::admin::AdminID;
+use crate::data::user::UserID;
 
 #[derive(serde::Serialize, serde::Deserialize, Clone)]
 pub enum AdminAction {
@@ -13,6 +14,7 @@ pub enum AdminAction {
     UpdatedAdminGeneralSettings { target: AdminID, new_email: String, new_name: String },
     AddAdminRole { target: AdminID, role: String },
     RemoveAdminRole { target: AdminID, role: String },
+    AccessUserPage { user_id: UserID, user_name: String },
     UnsupportedAction { raw_data: String },
 }
 
@@ -45,6 +47,8 @@ impl AdminAction {
             AdminAction::RemoveAdminRole { .. } =>
                 { "Removed a role from [admin]{target}[/admin] => {role}" }
 
+            AdminAction::AccessUserPage { .. } => { "Administrator accessed information of user #{user_id} '{user_name}'." }
+
             AdminAction::UnsupportedAction { .. } => { "Unsupported action. Raw data: {raw_data}" }
         }
     }
diff --git a/src/data/user.rs b/src/data/user.rs
index c65530d..361596c 100644
--- a/src/data/user.rs
+++ b/src/data/user.rs
@@ -1,5 +1,8 @@
 use std::hash::{Hash, Hasher};
 
+use serde::{Deserialize, Deserializer, Serialize, Serializer};
+
+use crate::data::u64_visitor::U64Visitor;
 use crate::utils::user_data_utils::user_data_url;
 
 ///! User information
@@ -61,6 +64,20 @@ impl PartialEq<UserID> for &UserID {
     }
 }
 
+impl Serialize for UserID {
+    fn serialize<S>(&self, serializer: S) -> Result<<S as Serializer>::Ok, <S as Serializer>::Error> where
+        S: Serializer {
+        serializer.serialize_u64(self.0)
+    }
+}
+
+impl<'de> Deserialize<'de> for UserID {
+    fn deserialize<D>(deserializer: D) -> Result<Self, <D as Deserializer<'de>>::Error> where
+        D: Deserializer<'de> {
+        deserializer.deserialize_u64(U64Visitor {}).map(|id| UserID::new(id))
+    }
+}
+
 #[derive(Debug, PartialEq)]
 pub enum UserPageVisibility {
     OPEN,