diff --git a/.github/workflows/release.yml b/.github/workflows/release.yml
index 0d9cdaf..3a60e3b 100644
--- a/.github/workflows/release.yml
+++ b/.github/workflows/release.yml
@@ -47,6 +47,7 @@ jobs:
           JWT_SECRET: "test-secret-at-least-256-bits-used"
           VKID_CLIENT_ID: 0
           VKID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          REQWEST_USER_AGENT: "Dalvik/2.1.0 (Linux; U; Android 6.0.1; OPPO R9s Build/MMB29M)"
   build:
     name: Build
     runs-on: ubuntu-latest
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 4f75625..fb83801 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -27,4 +27,5 @@ jobs:
           DATABASE_URL: ${{ secrets.TEST_DATABASE_URL }}
           JWT_SECRET: "test-secret-at-least-256-bits-used"
           VKID_CLIENT_ID: 0
-          VKID_REDIRECT_URI: "vk0://vk.com/blank.html"
\ No newline at end of file
+          VKID_REDIRECT_URI: "vk0://vk.com/blank.html"
+          REQWEST_USER_AGENT: "Dalvik/2.1.0 (Linux; U; Android 6.0.1; OPPO R9s Build/MMB29M)"
\ No newline at end of file
diff --git a/src/routes/schedule/update_download_url.rs b/src/routes/schedule/update_download_url.rs
index 9591336..46b17c8 100644
--- a/src/routes/schedule/update_download_url.rs
+++ b/src/routes/schedule/update_download_url.rs
@@ -4,7 +4,7 @@ use crate::app_state::Schedule;
 use crate::parser::parse_xls;
 use crate::routes::schedule::schema::CacheStatus;
 use crate::routes::schema::{IntoResponseAsError, ResponseError};
-use crate::xls_downloader::interface::XLSDownloader;
+use crate::xls_downloader::interface::{FetchError, XLSDownloader};
 use actix_web::web::Json;
 use actix_web::{patch, web};
 use chrono::Utc;
@@ -60,16 +60,18 @@ pub async fn update_download_url(
                     }
                 },
                 Err(error) => {
-                    eprintln!("Unknown url provided {}", data.url);
-                    eprintln!("{:?}", error);
+                    if let FetchError::Unknown(error) = error {
+                        sentry::capture_error(&error);
+                    }
 
                     ErrorCode::DownloadFailed.into_response()
                 }
             }
         }
         Err(error) => {
-            eprintln!("Unknown url provided {}", data.url);
-            eprintln!("{:?}", error);
+            if let FetchError::Unknown(error) = error {
+                sentry::capture_error(&error);
+            }
 
             ErrorCode::FetchFailed.into_response()
         }
diff --git a/src/xls_downloader/basic_impl.rs b/src/xls_downloader/basic_impl.rs
index bd15e5f..c58e627 100644
--- a/src/xls_downloader/basic_impl.rs
+++ b/src/xls_downloader/basic_impl.rs
@@ -1,11 +1,13 @@
 use crate::xls_downloader::interface::{FetchError, FetchOk, FetchResult, XLSDownloader};
 use chrono::{DateTime, Utc};
+use std::env;
 
 pub struct BasicXlsDownloader {
     pub url: Option<String>,
+    user_agent: String,
 }
 
-async fn fetch_specified(url: &String, user_agent: String, head: bool) -> FetchResult {
+async fn fetch_specified(url: &String, user_agent: &String, head: bool) -> FetchResult {
     let client = reqwest::Client::new();
 
     let response = if head {
@@ -13,7 +15,7 @@ async fn fetch_specified(url: &String, user_agent: String, head: bool) -> FetchR
     } else {
         client.get(url)
     }
-    .header("User-Agent", user_agent)
+    .header("User-Agent", user_agent.clone())
     .send()
     .await;
 
@@ -49,13 +51,16 @@ async fn fetch_specified(url: &String, user_agent: String, head: bool) -> FetchR
                 })
             }
         }
-        Err(_) => Err(FetchError::Unknown),
+        Err(e) => Err(FetchError::Unknown(e)),
     }
 }
 
 impl BasicXlsDownloader {
     pub fn new() -> Self {
-        BasicXlsDownloader { url: None }
+        BasicXlsDownloader {
+            url: None,
+            user_agent: env::var("REQWEST_USER_AGENT").expect("USER_AGENT must be set"),
+        }
     }
 }
 
@@ -64,17 +69,12 @@ impl XLSDownloader for BasicXlsDownloader {
         if self.url.is_none() {
             Err(FetchError::NoUrlProvided)
         } else {
-            fetch_specified(
-                self.url.as_ref().unwrap(),
-                "t.me/polytechnic_next".to_string(),
-                head,
-            )
-            .await
+            fetch_specified(self.url.as_ref().unwrap(), &self.user_agent, head).await
         }
     }
 
     async fn set_url(&mut self, url: String) -> FetchResult {
-        let result = fetch_specified(&url, "t.me/polytechnic_next".to_string(), true).await;
+        let result = fetch_specified(&url, &self.user_agent, true).await;
 
         if let Ok(_) = result {
             self.url = Some(url);
@@ -95,8 +95,8 @@ mod tests {
         let user_agent = String::new();
 
         let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
+            fetch_specified(&url, &user_agent, true).await,
+            fetch_specified(&url, &user_agent, false).await,
         ];
 
         assert!(results[0].is_err());
@@ -109,8 +109,8 @@ mod tests {
         let user_agent = String::new();
 
         let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
+            fetch_specified(&url, &user_agent, true).await,
+            fetch_specified(&url, &user_agent, false).await,
         ];
 
         assert!(results[0].is_err());
@@ -132,8 +132,8 @@ mod tests {
         let user_agent = String::new();
 
         let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
+            fetch_specified(&url, &user_agent, true).await,
+            fetch_specified(&url, &user_agent, false).await,
         ];
 
         assert!(results[0].is_err());
@@ -149,8 +149,8 @@ mod tests {
         let user_agent = String::new();
 
         let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
+            fetch_specified(&url, &user_agent, true).await,
+            fetch_specified(&url, &user_agent, false).await,
         ];
 
         assert!(results[0].is_err());
@@ -172,8 +172,8 @@ mod tests {
         let user_agent = String::new();
 
         let results = [
-            fetch_specified(&url, user_agent.clone(), true).await,
-            fetch_specified(&url, user_agent.clone(), false).await,
+            fetch_specified(&url, &user_agent, true).await,
+            fetch_specified(&url, &user_agent, false).await,
         ];
 
         assert!(results[0].is_ok());
diff --git a/src/xls_downloader/interface.rs b/src/xls_downloader/interface.rs
index ef7d197..b14a09c 100644
--- a/src/xls_downloader/interface.rs
+++ b/src/xls_downloader/interface.rs
@@ -1,13 +1,14 @@
 use chrono::{DateTime, Utc};
+use std::mem::discriminant;
 
 /// XLS data retrieval errors.
-#[derive(PartialEq, Debug)]
+#[derive(Debug)]
 pub enum FetchError {
     /// File url is not set.
     NoUrlProvided,
 
     /// Unknown error.
-    Unknown,
+    Unknown(reqwest::Error),
 
     /// Server returned a status code different from 200.
     BadStatusCode,
@@ -19,6 +20,12 @@ pub enum FetchError {
     BadHeaders,
 }
 
+impl PartialEq for FetchError {
+    fn eq(&self, other: &Self) -> bool {
+        discriminant(self) == discriminant(other)
+    }
+}
+
 /// Result of XLS data retrieval.
 pub struct FetchOk {
     /// ETag object.