diff --git a/wsgi.py b/wsgi.py
index c70a034..8555050 100644
--- a/wsgi.py
+++ b/wsgi.py
@@ -1,5 +1,5 @@
 import pandas as pd
-from flask import Flask, render_template
+from flask import Flask, render_template, request
 
 from download_digital import construct_dataframe
 
@@ -9,8 +9,11 @@ app = Flask(__name__)
 @app.route("/")
 def tables(
     url: str = "https://beschaeftigtenbefragung.verdi.de/",
-    tag: str = "bez_data_2",
+    default_tag: str = "bez_data_2",
 ):
+    tag = request.args.get("tag")
+    if tag is None:
+        tag = default_tag
     df = construct_dataframe(url=url, tag=tag, grouped=False)
 
     output_str = []
@@ -51,5 +54,6 @@ def tables(
 
     return render_template("base.html", tables="\n".join(output_str))
 
+
 if __name__ == "__main__":
     app.run()