diff --git a/app/__init__.py b/app/__init__.py
index bc00524..78e2c39 100644
--- a/app/__init__.py
+++ b/app/__init__.py
@@ -7,7 +7,7 @@ import uuid
 
 from flask import Flask, Response, g, request
 
-from app.config import config
+from app.config import VERSION, config
 
 
 def setup_logging(app: Flask) -> None:
@@ -176,7 +176,7 @@ def setup_metrics(app: Flask) -> None:
         metrics = PrometheusMetrics(app)
 
         # Add app info
-        metrics.info("flaskpaste_info", "FlaskPaste application info", version="1.0.0")
+        metrics.info("flaskpaste_info", "FlaskPaste application info", version=VERSION)
 
         app.extensions["metrics"] = metrics
     except ImportError:
diff --git a/app/api/routes.py b/app/api/routes.py
index c4ca379..5f1505b 100644
--- a/app/api/routes.py
+++ b/app/api/routes.py
@@ -11,6 +11,7 @@ import time
 from flask import Response, current_app, request
 
 from app.api import bp
+from app.config import VERSION
 from app.database import check_content_hash, get_db
 
 # Valid paste ID pattern (hexadecimal only)
@@ -275,7 +276,7 @@ def index():
     return _json_response(
         {
             "name": "FlaskPaste",
-            "version": "1.0.0",
+            "version": VERSION,
             "endpoints": {
                 "GET /": "API information",
                 "GET /health": "Health check",
diff --git a/app/config.py b/app/config.py
index 4d7591d..94bf071 100644
--- a/app/config.py
+++ b/app/config.py
@@ -3,6 +3,9 @@
 import os
 from pathlib import Path
 
+# Application version
+VERSION = "1.1.0"
+
 
 class Config:
     """Base configuration."""
diff --git a/documentation/api.md b/documentation/api.md
index 07ce694..da416fe 100644
--- a/documentation/api.md
+++ b/documentation/api.md
@@ -103,7 +103,7 @@ Host: localhost:5000
 ```json
 {
   "name": "FlaskPaste",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "endpoints": {
     "GET /": "API information",
     "GET /health": "Health check",
diff --git a/tests/test_api.py b/tests/test_api.py
index 5628d94..30c2179 100644
--- a/tests/test_api.py
+++ b/tests/test_api.py
@@ -2,6 +2,8 @@
 
 import json
 
+from app.config import VERSION
+
 
 class TestIndex:
     """Tests for GET / endpoint."""
@@ -12,7 +14,7 @@ class TestIndex:
         assert response.status_code == 200
         data = json.loads(response.data)
         assert data["name"] == "FlaskPaste"
-        assert data["version"] == "1.0.0"
+        assert data["version"] == VERSION
         assert "endpoints" in data
         assert "usage" in data