diff --git a/pipenv/vendor/pythonfinder/models/python.py b/pipenv/vendor/pythonfinder/models/python.py
index 6176fad4..f10ddb4e 100644
--- a/pipenv/vendor/pythonfinder/models/python.py
+++ b/pipenv/vendor/pythonfinder/models/python.py
@@ -65,7 +65,7 @@ class PythonVersion(object):
     def matches(
         self, major=None, minor=None, patch=None, pre=False, dev=False, arch=None
     ):
-        if arch and arch.isnumeric():
+        if arch and arch.isdigit():
             arch = "{0}bit".format(arch)
         return (
             (major is None or self.major == major)
@@ -192,7 +192,7 @@ class PythonVersion(object):
     @classmethod
     def create(cls, **kwargs):
         if "architecture" in kwargs:
-            if kwargs["architecture"].isnumeric():
+            if kwargs["architecture"].isdigit():
                 kwargs["architecture"] = "{0}bit".format(kwargs["architecture"])
         return cls(**kwargs)
 
diff --git a/pipenv/vendor/pythonfinder/pythonfinder.py b/pipenv/vendor/pythonfinder/pythonfinder.py
index d6f49bf7..035842e2 100644
--- a/pipenv/vendor/pythonfinder/pythonfinder.py
+++ b/pipenv/vendor/pythonfinder/pythonfinder.py
@@ -66,7 +66,7 @@ class Finder(object):
         ):
             if arch is None and "-" in major:
                 major, arch = major.rsplit("-", 1)
-                if not arch.isnumeric():
+                if not arch.isdigit():
                     major = "{0}-{1}".format(major, arch)
                 else:
                     arch = "{0}bit".format(arch)