diff --git a/README.md b/README.md
index b566306..1c0b70c 100644
--- a/README.md
+++ b/README.md
@@ -105,8 +105,8 @@ One can configure the tools, tags, upload images and do many more from the setti
     ```sh
    python3 -m venv venv
 
-    source venv/bin/activate  # On Windows use `venv\Scripts\activate`
-    ```
+   source venv/bin/activate  # On Windows use `venv\Scripts\activate`
+   ```
 3. Install the dependencies:
 ```sh
    pip install -r requirements.txt
@@ -197,8 +197,17 @@ This command discovers and runs all test files (`test_*.py`) in the `server/test
 2. Use the user interface to upload and annotate images.
 3. The annotations and other interactions will be handled by the Flask server running at [http://localhost:5000](http://localhost:5000).
 
+## Configurations (Optional)
+You can customize some aspects of Annotate-Lab through configuration settings. 
+To do this, modify the `config.py` file in the `server` directory:
+```python
+# config.py
+MASK_BACKGROUND_COLOR = (0, 0, 0)  # Black background for masks
+OUTLINE_THICKNESS = 5  # Thicker outlines (5 pixels)
+```
+
 ## Outputs
-Sample of annotated image  along with its mask and settings is show below.
+Sample of annotated image along with its mask and settings is show below.
 
 ![orange_annotation](./sample_images/orange_annotated-image.png)
 ![orange_annotation_mask](./sample_images/orange_masked-image.png)
diff --git a/server/app.py b/server/app.py
index 8b19a1e..d9445c6 100644
--- a/server/app.py
+++ b/server/app.py
@@ -295,7 +295,7 @@ def download_image_with_annotations():
                     points = region['points']
                     scaled_points = [(x * width, y * height) for x, y in points]
                     # Draw polygon with thicker outline
-                    draw.line(scaled_points + [scaled_points[0]], fill=color, width=3)  # Change width as desired
+                    draw.line(scaled_points + [scaled_points[0]], fill=color, width=app.config['OUTLINE_THICKNESS_CONFIG']['POLYGON'])  # Change width as desired
                 elif all(key in region for key in ('x', 'y', 'w', 'h')):
                     try:
                         x = float(region['x'][1:-1]) * width if isinstance(region['x'], str) else float(region['x'][0]) * width
@@ -305,7 +305,7 @@ def download_image_with_annotations():
                     except (ValueError, TypeError) as e:
                         raise ValueError(f"Invalid format in region dimensions: {region}, Error: {e}")
                     # Draw rectangle with thicker outline
-                    draw.rectangle([x, y, x + w, y + h], outline=color, width=3)
+                    draw.rectangle([x, y, x + w, y + h], outline=color, width=app.config['OUTLINE_THICKNESS_CONFIG']['BOUNDING_BOX'])
                 elif all(key in region for key in ('rx', 'ry', 'rw', 'rh')):
                     try:
                         rx = float(region['rx'][1:-1]) * width if isinstance(region['rx'], str) else float(region['rx'][0]) * width
@@ -315,7 +315,7 @@ def download_image_with_annotations():
                     except (ValueError, TypeError) as e:
                         raise ValueError(f"Invalid format in region dimensions: {region}, Error: {e}")
                     # Draw ellipse (circle if rw and rh are equal)
-                    draw.ellipse([rx, ry, rx + rw, ry + rh], outline=color, width=3) 
+                    draw.ellipse([rx, ry, rx + rw, ry + rh], outline=color, width=app.config['OUTLINE_THICKNESS_CONFIG']['CIRCLE']) 
 
 
             
@@ -375,7 +375,7 @@ def download_image_mask():
                 if 'points' in region and region['points']:
                     points = region['points']
                     scaled_points = [(int(x * width), int(y * height)) for x, y in points]
-                    draw.polygon(scaled_points, outline=color, fill=color)
+                    draw.polygon(scaled_points, outline=color, fill=color, width=app.config['OUTLINE_THICKNESS_CONFIG']['POLYGON'])
                 elif all(key in region for key in ('x', 'y', 'w', 'h')):
                     try:
                         x = float(region['x'][1:-1]) * width if isinstance(region['x'], str) else float(region['x'][0]) * width
@@ -385,7 +385,7 @@ def download_image_mask():
                     except (ValueError, TypeError) as e:
                         raise ValueError(f"Invalid format in region dimensions: {region}, Error: {e}")
                     # Draw rectangle for bounding box
-                    draw.rectangle([x, y, x + w, y + h], outline=color, fill=color)
+                    draw.rectangle([x, y, x + w, y + h], outline=color, fill=color, width=app.config['OUTLINE_THICKNESS_CONFIG']['BOUNDING_BOX'])
                 elif all(key in region for key in ('rx', 'ry', 'rw', 'rh')):
                     try:
                         rx = float(region['rx'][1:-1]) * width if isinstance(region['rx'], str) else float(region['rx'][0]) * width
@@ -395,7 +395,7 @@ def download_image_mask():
                     except (ValueError, TypeError) as e:
                         raise ValueError(f"Invalid format in region dimensions: {region}, Error: {e}")
                     # Draw ellipse (circle if rw and rh are equal)
-                    draw.ellipse([rx, ry, rx + rw, ry + rh], outline=color, width=3, fill=color)
+                    draw.ellipse([rx, ry, rx + rw, ry + rh], outline=color, width=app.config['OUTLINE_THICKNESS_CONFIG']['CIRCLE'], fill=color)
 
             mask_byte_arr = BytesIO()
             mask.save(mask_byte_arr, format='PNG')
diff --git a/server/config.py b/server/config.py
index a709cf7..1e23bc8 100644
--- a/server/config.py
+++ b/server/config.py
@@ -1 +1,6 @@
-MASK_BACKGROUND_COLOR = (0, 0, 0)
\ No newline at end of file
+MASK_BACKGROUND_COLOR = (0, 0, 0)
+OUTLINE_THICKNESS_CONFIG = {
+    "POLYGON": 3,
+    "CIRCLE": 3,
+    "BOUNDING_BOX": 3
+} # change outline thickness (currently only for downloaded files)
\ No newline at end of file