diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cbed580..fbc78392 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,10 @@ and this project adheres to [Semantic Versioning](http://semver.org/).
 
 - Points imported from Google Location History (mobile devise) now have correct timestamps
 
+### Changed
+
+- `GET /api/v1/points?slim=true` now returns `id` attribute for each point
+
 # [0.14.5] - 2024-09-28
 
 ### Fixed
diff --git a/app/controllers/api/v1/points_controller.rb b/app/controllers/api/v1/points_controller.rb
index 6079b60c..a7d1a622 100644
--- a/app/controllers/api/v1/points_controller.rb
+++ b/app/controllers/api/v1/points_controller.rb
@@ -11,7 +11,7 @@ class Api::V1::PointsController < ApiController
              .order(:timestamp)
              .page(params[:page])
              .per(params[:per_page] || 100)
-    
+
     serialized_points = points.map { |point| point_serializer.new(point).call }
 
     response.set_header('X-Current-Page', points.current_page.to_s)
@@ -30,6 +30,6 @@ class Api::V1::PointsController < ApiController
   private
 
   def point_serializer
-    params[:slim] ? SlimPointSerializer : PointSerializer
+    params[:slim] == 'true' ? SlimPointSerializer : PointSerializer
   end
 end
diff --git a/app/serializers/slim_point_serializer.rb b/app/serializers/slim_point_serializer.rb
index b9b28d3c..9d6a0450 100644
--- a/app/serializers/slim_point_serializer.rb
+++ b/app/serializers/slim_point_serializer.rb
@@ -7,7 +7,8 @@ class SlimPointSerializer
 
   def call
     {
-      latitude: point.latitude,
+      id:        point.id,
+      latitude:  point.latitude,
       longitude: point.longitude,
       timestamp: point.timestamp
     }
diff --git a/spec/requests/api/v1/points_spec.rb b/spec/requests/api/v1/points_spec.rb
index 32839871..d8ac15c4 100644
--- a/spec/requests/api/v1/points_spec.rb
+++ b/spec/requests/api/v1/points_spec.rb
@@ -46,13 +46,13 @@ RSpec.describe 'Api::V1::Points', type: :request do
 
     context 'when slim version of points is requested' do
       it 'renders a successful response' do
-        get api_v1_points_url(api_key: user.api_key, slim: true)
+        get api_v1_points_url(api_key: user.api_key, slim: 'true')
 
         expect(response).to be_successful
       end
 
       it 'returns a list of points' do
-        get api_v1_points_url(api_key: user.api_key, slim: true)
+        get api_v1_points_url(api_key: user.api_key, slim: 'true')
 
         expect(response).to have_http_status(:ok)
 
@@ -62,7 +62,7 @@ RSpec.describe 'Api::V1::Points', type: :request do
       end
 
       it 'returns a list of points with pagination' do
-        get api_v1_points_url(api_key: user.api_key, slim: true, page: 2, per_page: 10)
+        get api_v1_points_url(api_key: user.api_key, slim: 'true', page: 2, per_page: 10)
 
         expect(response).to have_http_status(:ok)
 
@@ -72,7 +72,7 @@ RSpec.describe 'Api::V1::Points', type: :request do
       end
 
       it 'returns a list of points with pagination headers' do
-        get api_v1_points_url(api_key: user.api_key, slim: true, page: 2, per_page: 10)
+        get api_v1_points_url(api_key: user.api_key, slim: 'true', page: 2, per_page: 10)
 
         expect(response).to have_http_status(:ok)
 
@@ -81,7 +81,7 @@ RSpec.describe 'Api::V1::Points', type: :request do
       end
 
       it 'returns a list of points with slim attributes' do
-        get api_v1_points_url(api_key: user.api_key, slim: true)
+        get api_v1_points_url(api_key: user.api_key, slim: 'true')
 
         expect(response).to have_http_status(:ok)