diff --git a/aurweb/packages/util.py b/aurweb/packages/util.py
index 2cc00db9..78d79508 100644
--- a/aurweb/packages/util.py
+++ b/aurweb/packages/util.py
@@ -1,6 +1,7 @@
 from collections import defaultdict
 from http import HTTPStatus
 from typing import Tuple, Union
+from urllib.parse import quote_plus
 
 import orjson
 from fastapi import HTTPException
@@ -246,5 +247,5 @@ def source_uri(pkgsrc: models.PackageSource) -> Tuple[str, str]:
     elif "://" in pkgsrc.Source:
         return pkgsrc.Source, pkgsrc.Source
     path = config.get("options", "source_file_uri")
-    pkgbasename = pkgsrc.Package.PackageBase.Name
+    pkgbasename = quote_plus(pkgsrc.Package.PackageBase.Name)
     return pkgsrc.Source, path % (pkgsrc.Source, pkgbasename)
diff --git a/test/test_packages_util.py b/test/test_packages_util.py
index 23e85e1b..bae84614 100644
--- a/test/test_packages_util.py
+++ b/test/test_packages_util.py
@@ -109,6 +109,12 @@ def test_source_uri_file(package: Package):
     expected = source_file_uri % (pkgsrc.Source, package.PackageBase.Name)
     assert (file, uri) == (FILE, expected)
 
+    # test URL encoding
+    pkgsrc.Package.PackageBase.Name = "test++"
+    file, uri = util.source_uri(pkgsrc)
+    expected = source_file_uri % (pkgsrc.Source, "test%2B%2B")
+    assert uri == expected
+
 
 def test_source_uri_named_uri(package: Package):
     FILE = "test"