diff --git a/src/app.py b/src/app.py
index dff3806..932e94a 100644
--- a/src/app.py
+++ b/src/app.py
@@ -1,41 +1,113 @@
+import uvicorn
 import requests
-from flask import Flask, render_template, abort, request, jsonify
+
+from fastapi import (
+    FastAPI,
+    Request,
+    HTTPException,
+)
+from fastapi.responses import FileResponse
+from starlette.staticfiles import StaticFiles
+from fastapi.templating import Jinja2Templates
 
 
-app = Flask(__name__)
 VATSIM_API_URL = "https://api.vatsim.net/v2/"
 
-
-@app.route("/")
-def index_page():
-    return render_template("index.html")
+app = FastAPI(
+    title="VATSIM Fox",
+    docs_url=None,
+    redoc_url=None,
+    openapi_url=None,
+    redirect_slashes=True
+)
+templates = Jinja2Templates(directory="templates")
+app.mount("/static", StaticFiles(directory="static"), name="static")
 
 
-@app.errorhandler(404)
-def errorhandler_page(_):
-    return render_template("4O4.html"), 404
+@app.get("/")
+async def get_index_page(request: Request):
+    """
+    Index page
+
+    :param request: FastAPI request
+    :return: HTML template
+    """
+
+    return templates.TemplateResponse(
+        name="index.html",
+        context={
+            "request": request,
+        }
+    )
 
 
-@app.route("/api/request")
-def request_handler():
-    if request_string := request.args.get("request_string"):
+@app.get("/favicon.ico", include_in_schema=False)
+async def get_favicon():
+    """
+    Get favicon
+
+    :return: Icon file
+    """
+
+    return FileResponse("./static/icon.ico")
+
+
+@app.get("/{cid}/")
+async def get_viewer_page(request: Request, cid: str = None):
+    """
+    Viewer page
+
+    :param request: FastAPI request
+    :param cid: User CID
+    :return: HTML template
+    """
+
+    user = requests.get(f"{VATSIM_API_URL}members/{cid}").json()
+    if "detail" in user and user["detail"] == "Not Found":
+        return HTTPException(404)
+
+    return templates.TemplateResponse(
+        name="viewer.html",
+        context={
+            "user": user,
+            "request": request,
+        }
+    )
+
+
+@app.exception_handler(404)
+async def error_handler(request: Request, _):
+    """
+    Handler to the 404 HTTP error
+
+    :param request: FastAPI request
+    :return: HTML template
+    """
+
+    return templates.TemplateResponse(
+        name="4O4.html",
+        context={
+            "request": request,
+        }
+    )
+
+
+@app.get("/api/request")
+def request_handler(request_string: str):
+    """
+    Wrapper to the VATSIM API functions
+
+    :param request_string: String that will fetched from VATSIM API
+    """
+
+    if request_string:
         try:
             return requests.get(f"{VATSIM_API_URL}{request_string}").json()
         except requests.exceptions.JSONDecodeError:
-            return jsonify({"result": "error", "message": "Something went wrong. Report that error please"})
+            return {"result": "error", "message": "Something went wrong. Report that error please"}
 
-    return jsonify({"result": "not found", "message": "Not found"})
-
-
-@app.route("/<int:cid>/")
-def viewer_page(cid):
-    user = requests.get(f"{VATSIM_API_URL}members/{cid}").json()
-
-    if "detail" in user and user["detail"] == "Not Found":
-        return abort(404)
-
-    return render_template("viewer.html", user=user)
+    return {"result": "not found", "message": "Not found"}
 
 
 if __name__ == "__main__":
-    app.run(host="0.0.0.0", port=80)
+    uvicorn.run(app=app, host="0.0.0.0", port=80)
diff --git a/src/templates/include/template.html b/src/templates/include/template.html
index 21f00be..04a6b9f 100644
--- a/src/templates/include/template.html
+++ b/src/templates/include/template.html
@@ -10,7 +10,7 @@
     <meta content="yes" name="apple-touch-fullscreen" />
     <meta name="apple-mobile-web-app-status-bar-style" content="#FA8232">
     <meta name="format-detection" content="telephone=no">
-    <link rel="icon" href="{{ url_for('static', filename='icon.ico') }}" type="image/x-icon">
+    <link rel="icon" href="{{ url_for('static', path='icon.ico') }}" type="image/x-icon">
     <title>{% block title %}{% endblock %}</title>
     <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/font-awesome/4.7.0/css/font-awesome.min.css">
     <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.2.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-rbsA2VBKQhggwzxH7pPCaAqO46MgnOM80zW1RWuH61DGLwZJEdK2Kadq2F9CUG65" crossorigin="anonymous">
@@ -50,9 +50,7 @@
         <footer class="text-muted border-top">
             <div class="container py-4">
                 created by 
-                <a href="https://uw935.t.me/" style="text-decoration: underline; cursor: pointer;">
-                    uw935
-                </a> (1606255)
+                <a href="https://uw935.com/" style="text-decoration: underline; cursor: pointer;">uw935</a> (1606255)
             </div>
         </footer>
 	</main>
diff --git a/src/templates/viewer.html b/src/templates/viewer.html
index af2b9af..31baa86 100644
--- a/src/templates/viewer.html
+++ b/src/templates/viewer.html
@@ -1,7 +1,7 @@
 {% extends "/include/template.html" %}
 {% block title %}User {{user["id"]}} statistic — VATSIM Fox{% endblock %}
 {% block header_css %}
-<link rel="stylesheet" href="{{ url_for('static', filename='viewer.css') }}">
+<link rel="stylesheet" href="{{ url_for('static', path='viewer.css') }}">
 <link href="https://unpkg.com/leaflet@1.6.0/dist/leaflet.css" rel="stylesheet"/>
 {% endblock %}
 {% block content %}
@@ -146,5 +146,5 @@
 
     $(".date_registration").text("{{user['reg_date']}}".replace("T", " "));
 </script>
-<script type="text/javascript" src="{{ url_for('static', filename='viewer.js') }}"></script>
+<script type="text/javascript" src="{{ url_for('static', path='viewer.js') }}"></script>
 {% endblock %}