diff --git a/pype/lib.py b/pype/lib.py
index c926601a14..12ec1f5584 100644
--- a/pype/lib.py
+++ b/pype/lib.py
@@ -495,7 +495,7 @@ def filter_pyblish_plugins(plugins):
 
 def get_subsets(asset_name,
                 regex_filter=None,
-                version="last",
+                version=None,
                 representations=["exr", "dpx"]):
     """
     Query subsets with filter on name.
@@ -538,11 +538,12 @@ def get_subsets(asset_name,
     output_dict = {}
     # Process subsets
     for subset in subsets:
-        if "last" in str(version):
+        if not version:
             version_sel = io.find_one({"type": "version",
                                        "parent": subset["_id"]},
                                       sort=[("name", -1)])
         else:
+            assert isinstance(version, int), "version needs to be `int` type"
             version_sel = io.find_one({"type": "version",
                                        "parent": subset["_id"],
                                        "name": int(version)})
diff --git a/pype/nuke/lib.py b/pype/nuke/lib.py
index a43a3d32a5..1eae684b6f 100644
--- a/pype/nuke/lib.py
+++ b/pype/nuke/lib.py
@@ -889,7 +889,7 @@ class BuildWorkfile(WorkfileSettings):
 
     def process(self,
                 regex_filter=None,
-                version="last",
+                version=None,
                 representations=["exr", "dpx"]):
         """
         A short description.
@@ -897,7 +897,9 @@ class BuildWorkfile(WorkfileSettings):
         A bit longer description.
 
         Args:
-            variable (type): description
+            regex_filter (raw string): regex pattern to filter out subsets
+            version (int): define a particular version, None gets last
+            representations (list): 
 
         Returns:
             type: description