diff --git a/simple_webfinger/app.py b/simple_webfinger/app.py
index 02841e7..cf3f3ec 100644
--- a/simple_webfinger/app.py
+++ b/simple_webfinger/app.py
@@ -48,12 +48,10 @@ def get_account_links(user: str, data: dict) -> list:
     return links
 
 
-def filter_links(links: dict[str, str], rel: str) -> list:
+def filter_links(links: dict[str, str], rel: list[str]) -> list:
     """
     Filter links by rel provided.
     """
-    if isinstance(rel, str):
-        rel = [rel]
     new_links = []
     for link in links:
         if link["rel"] in rel:
@@ -105,7 +103,8 @@ def create_app(config={}):
 
             # If we have a 'rel' value on the request, filter down to the requested rel
             # https://datatracker.ietf.org/doc/html/rfc7033#section-4.3
-            rel = request.args.get("rel")
+            print(request.args)
+            rel = request.args.getlist("rel")
             if rel:
                 links = filter_links(links, rel)
 
diff --git a/tests/test_basic.py b/tests/test_basic.py
index 1fc1878..b0f5cd5 100644
--- a/tests/test_basic.py
+++ b/tests/test_basic.py
@@ -44,3 +44,31 @@ def test_invalid_user_request(app, client):
     """
     response = client.get("/.well-known/webfinger?resource=nikdoof@doofnet.uk")
     assert response.status_code == 404
+
+def test_rel_filtering(client):
+    """
+    Check that filtering links by rel work correctly
+    """
+    response = client.get("/.well-known/webfinger?resource=acct:nikdoof@doofnet.uk&rel=self")
+    assert response.status_code == 200
+
+    assert len(response.json['links'])
+    for link in response.json['links']:
+        assert link['rel'] == 'self'
+
+def test_multiple_rel_filtering(client):
+    """
+    Check that filtering links by mulitple rel work correctly
+    """
+    rels = ['self', 'http://webfinger.net/rel/profile-page']
+    params = {
+        'resource': 'acct:nikdoof@doofnet.uk',
+        'rel': rels,
+    }
+
+    response = client.get("/.well-known/webfinger", query_string=params)
+    assert response.status_code == 200
+
+    assert len(response.json['links']) > 1
+    for link in response.json['links']:
+        assert link['rel'] in rels