diff --git a/umap/tests/test_views.py b/umap/tests/test_views.py
index 94ae80f4..780cf5ad 100644
--- a/umap/tests/test_views.py
+++ b/umap/tests/test_views.py
@@ -127,9 +127,9 @@ def test_invalid_proxy_url_should_return_400(client):
 
 
 def test_valid_proxy_request_with_x_accel_redirect(client, settings):
-    settings.UMAP_XSENDFILE_HEADER = 'X-Accel-Redirect'
+    settings.UMAP_XSENDFILE_HEADER = "X-Accel-Redirect"
     url = reverse("ajax-proxy")
-    params = {"url": "http://example.org", "ttl": 300}
+    params = {"url": "http://example.org?foo=bar&bar=foo", "ttl": 300}
     headers = {
         "HTTP_X_REQUESTED_WITH": "XMLHttpRequest",
         "HTTP_REFERER": settings.SITE_URL,
@@ -137,7 +137,10 @@ def test_valid_proxy_request_with_x_accel_redirect(client, settings):
     response = client.get(url, params, **headers)
     assert response.status_code == 200
     assert "X-Accel-Redirect" in response.headers
-    assert response["X-Accel-Redirect"] == "/proxy/http://example.org"
+    assert (
+        response["X-Accel-Redirect"]
+        == "/proxy/http%3A//example.org%3Ffoo%3Dbar%26bar%3Dfoo"
+    )
     assert "X-Accel-Expires" in response.headers
     assert response["X-Accel-Expires"] == "300"
 
diff --git a/umap/views.py b/umap/views.py
index b44cd2f4..d8935957 100644
--- a/umap/views.py
+++ b/umap/views.py
@@ -7,6 +7,7 @@ from datetime import date, timedelta
 from http.client import InvalidURL
 from pathlib import Path
 from urllib.error import URLError
+from urllib.parse import quote
 
 from django.conf import settings
 from django.contrib import messages
@@ -346,7 +347,6 @@ def validate_url(request):
 
 class AjaxProxy(View):
     def get(self, *args, **kwargs):
-        # You should not use this in production (use Nginx or so)
         try:
             url = validate_url(self.request)
         except AssertionError:
@@ -357,11 +357,12 @@ class AjaxProxy(View):
             ttl = None
         if getattr(settings, "UMAP_XSENDFILE_HEADER", None):
             response = HttpResponse()
-            response[settings.UMAP_XSENDFILE_HEADER] = f"/proxy/{url}"
+            response[settings.UMAP_XSENDFILE_HEADER] = f"/proxy/{quote(url)}"
             if ttl:
                 response["X-Accel-Expires"] = ttl
             return response
 
+        # You should not use this in production (use Nginx or so)
         headers = {"User-Agent": "uMapProxy +http://wiki.openstreetmap.org/wiki/UMap"}
         request = Request(url, headers=headers)
         opener = build_opener()