diff --git a/pipenv/patched/piptools/repositories/pypi.py b/pipenv/patched/piptools/repositories/pypi.py
index 1db380a7..cfdc4aa7 100644
--- a/pipenv/patched/piptools/repositories/pypi.py
+++ b/pipenv/patched/piptools/repositories/pypi.py
@@ -167,7 +167,7 @@ class PyPIRepository(BaseRepository):
         all_candidates = []
         for c in self.find_all_candidates(ireq.name):
             python_specifier = SpecifierSet(c.requires_python)
-            if not python_specifier.contains(py_version):
+            if c.requires_python and not python_specifier.contains(py_version):
                 continue
             all_candidates.append(c)
 
diff --git a/tasks/vendoring/patches/patched/piptools.patch b/tasks/vendoring/patches/patched/piptools.patch
index 2d86c8be..1d219032 100644
--- a/tasks/vendoring/patches/patched/piptools.patch
+++ b/tasks/vendoring/patches/patched/piptools.patch
@@ -138,7 +138,7 @@ index 1c4b943..a15c23b 100644
 +        all_candidates = []
 +        for c in self.find_all_candidates(ireq.name):
 +            python_specifier = SpecifierSet(c.requires_python)
-+            if not python_specifier.contains(py_version):
++            if c.requires_python and not python_specifier.contains(py_version):
 +                continue
 +            all_candidates.append(c)
 +