diff --git a/api/src/main.py b/api/src/main.py
index d719c0e..4a26e5a 100644
--- a/api/src/main.py
+++ b/api/src/main.py
@@ -1,6 +1,6 @@
 import logging
 
-from fastapi import Depends, FastAPI, HTTPException
+from fastapi import Body, Depends, FastAPI, HTTPException
 from src import supabase_client
 from src.auth_manager import validate_user
 from src.types.training_week import TrainingWeek
@@ -27,3 +27,24 @@ async def training_week(user: UserRow = Depends(validate_user)):
     except ValueError as e:
         logger.error(f"Error retrieving training week: {e}", exc_info=True)
         raise HTTPException(status_code=404, detail=str(e))
+
+
+@app.post("/device_token/")
+async def update_device_token(
+    device_token: str = Body(..., embed=True), user: UserRow = Depends(validate_user)
+) -> dict:
+    """
+    Update device token for push notifications
+
+    :param device_token: The device token to register
+    :param user: The authenticated user
+    :return: Success status
+    """
+    try:
+        supabase_client.update_user_device_token(
+            athlete_id=user.athlete_id, device_token=device_token
+        )
+        return {"success": True}
+    except Exception as e:
+        logger.error(f"Failed to update device token: {e}", exc_info=True)
+        raise HTTPException(status_code=400, detail=str(e))
diff --git a/api/src/supabase_client.py b/api/src/supabase_client.py
index 6e841ab..8cf0aee 100644
--- a/api/src/supabase_client.py
+++ b/api/src/supabase_client.py
@@ -104,3 +104,15 @@ def upsert_user_auth(user_auth_row: UserAuthRow) -> None:
 
     table = client.table("user_auth")
     table.upsert(user_auth_row, on_conflict="athlete_id").execute()
+
+
+def update_user_device_token(athlete_id: str, device_token: str) -> None:
+    """
+    Update the device token for a user in the database.
+
+    :param athlete_id: The athlete's ID
+    :param device_token: The device token for push notifications
+    """
+    client.table("user_auth").update({"device_token": device_token}).eq(
+        "athlete_id", athlete_id
+    ).execute()
diff --git a/api/tests/test_get_training_week.py b/api/tests/test_get_training_week.py
index 5a5c2be..1948d97 100644
--- a/api/tests/test_get_training_week.py
+++ b/api/tests/test_get_training_week.py
@@ -17,3 +17,14 @@ def test_get_training_week_success():
     )
     assert TrainingWeek(**response.json())
     assert response.status_code == 200
+
+
+def test_update_device_token_success():
+    """Test successful update of device token"""
+    user_auth = get_user_auth(os.environ["JAMIES_ATHLETE_ID"])
+    response = client.post(
+        "/device_token/",
+        json={"device_token": user_auth.device_token},
+        headers={"Authorization": f"Bearer {user_auth.jwt_token}"},
+    )
+    assert response.status_code == 200
diff --git a/lambda/src/frontend_router.py b/lambda/src/frontend_router.py
index 9c04d81..3a956aa 100644
--- a/lambda/src/frontend_router.py
+++ b/lambda/src/frontend_router.py
@@ -82,7 +82,6 @@ def update_device_token_handler(athlete_id: str, payload: dict) -> dict:
     "update_preferences": update_preferences_handler,
     "get_weekly_summaries": get_weekly_summaries_handler,
     "start_onboarding": start_onboarding,
-    "update_device_token": update_device_token_handler,
 }
 
 
diff --git a/mobile/mobile/APIManager.swift b/mobile/mobile/APIManager.swift
index d51081f..0f433fb 100644
--- a/mobile/mobile/APIManager.swift
+++ b/mobile/mobile/APIManager.swift
@@ -268,32 +268,48 @@ class APIManager {
   }
 
   func updateDeviceToken(
-    token: String, deviceToken: String, completion: @escaping (Result<Void, Error>) -> Void
+    token: String,
+    deviceToken: String,
+    completion: @escaping (Result<Void, Error>) -> Void
   ) {
     let startTime = CFAbsoluteTimeGetCurrent()
-    let body: [String: Any] = [
-      "jwt_token": token,
-      "payload": ["device_token": deviceToken],
-      "method": "update_device_token",
-    ]
+    guard let url = URL(string: "\(apiURL)/device_token/") else {
+      completion(
+        .failure(NSError(domain: "", code: 0, userInfo: [NSLocalizedDescriptionKey: "Invalid URL"]))
+      )
+      return
+    }
 
-    performRequest(body: body, responseType: GenericResponse.self) { result in
+    var request = URLRequest(url: url)
+    request.httpMethod = "POST"
+    request.setValue("Bearer \(token)", forHTTPHeaderField: "Authorization")
+    request.setValue("application/json", forHTTPHeaderField: "Content-Type")
+
+    let payload = ["device_token": deviceToken]
+    request.httpBody = try? JSONSerialization.data(withJSONObject: payload)
+
+    session.dataTask(with: request) { data, response, error in
       let timeElapsed = CFAbsoluteTimeGetCurrent() - startTime
       print("APIManager: updateDeviceToken took \(timeElapsed) seconds")
 
-      switch result {
-      case .success(let response):
-        if response.success {
-          completion(.success(()))
-        } else {
-          let errorMessage = response.message ?? "Failed to update device token"
-          completion(
-            .failure(
-              NSError(domain: "", code: 0, userInfo: [NSLocalizedDescriptionKey: errorMessage])))
-        }
-      case .failure(let error):
+      if let httpResponse = response as? HTTPURLResponse,
+        !(200..<300).contains(httpResponse.statusCode)
+      {
+        let message = "Failed to update device token"
+        completion(
+          .failure(
+            NSError(
+              domain: "", code: httpResponse.statusCode,
+              userInfo: [NSLocalizedDescriptionKey: message])))
+        return
+      }
+
+      if let error = error {
         completion(.failure(error))
+        return
       }
-    }
+
+      completion(.success(()))
+    }.resume()
   }
 }