diff --git a/maven/artifact.py b/maven/artifact.py
index 5855772..22670d7 100644
--- a/maven/artifact.py
+++ b/maven/artifact.py
@@ -1,4 +1,4 @@
-import os
+import os.path
 
 class Artifact(object):
     def __init__(self, group_id, artifact_id, version, classifier=None, extension=None):
@@ -20,20 +20,23 @@ def is_snapshot(self):
         return self.version and self.version.endswith("-SNAPSHOT")
 
     def path(self, with_version=True):
-        base = self.group_id.replace(".", "/") + "/" + self.artifact_id
+        base = os.path.join(self.group_id.replace(".", "/"), self.artifact_id)
         if with_version:
-            return base + "/" + self.version
+            return os.path.join(base, self.version)
         else:
             return base
 
     def uri(self, base, resolved_version=None):
         if self.is_snapshot() and not resolved_version:
-            raise ValueError("Expected uniqueversion for snapshot artifact " + str(self))
+            raise ValueError("Expected unique version for snapshot artifact " + str(self))
         elif not self.is_snapshot():
             resolved_version = self.version
         if self.classifier:
-            return base + "/" + self.path() + "/" + self.artifact_id + "-" + resolved_version + "-" + self.classifier + "." + self.extension
-        return base + "/" + self.path() + "/" + self.artifact_id + "-" + resolved_version + "." + self.extension
+            return os.path.join(base, self.path(), "%s-%s-%s.%s" % (self.artifact_id, resolved_version,
+                                                                    self.classifier, self.extension))
+        return os.path.join(base, self.path(), "%s-%s.%s" % (self.artifact_id,
+                                                             resolved_version,
+                                                             self.extension))
 
     def with_version(self, _version):
         return Artifact(
@@ -45,9 +48,9 @@ def with_version(self, _version):
 
     def _generate_filename(self):
         if not self.classifier:
-            return self.artifact_id + "." + self.extension
+            return "%s.%s" % (self.artifact_id, self.extension)
         else:
-            return self.artifact_id + "-" + self.classifier + "." + self.extension
+            return "%s-%s.%s" % (self.artifact_id, self.classifier, self.extension)
 
     def get_filename(self, filename=None):
         if not filename: