diff --git a/vtracker/__init__.py b/vtracker/__init__.py
index 99c9c81..6014283 100644
--- a/vtracker/__init__.py
+++ b/vtracker/__init__.py
@@ -18,7 +18,7 @@
 __title__ = 'VTracker'
 __description__ = 'For tracking the relationship between group membership changes across versions.'
 __url__ = 'https://github.com/aaronmussig/vtracker'
-__version__ = '1.0.0'
+__version__ = '1.0.1'
 __author__ = 'Aaron Mussig'
 __author_email__ = 'aaronmussig@gmail.com'
 __license__ = 'GPL3'
diff --git a/vtracker/graph.py b/vtracker/graph.py
index c5f169d..7e2be8f 100644
--- a/vtracker/graph.py
+++ b/vtracker/graph.py
@@ -1,4 +1,21 @@
-from typing import Optional, Dict, Tuple, Generator, Set, Hashable
+###############################################################################
+#                                                                             #
+#    This program is free software: you can redistribute it and/or modify     #
+#    it under the terms of the GNU General Public License as published by     #
+#    the Free Software Foundation, either version 3 of the License, or        #
+#    (at your option) any later version.                                      #
+#                                                                             #
+#    This program is distributed in the hope that it will be useful,          #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of           #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            #
+#    GNU General Public License for more details.                             #
+#                                                                             #
+#    You should have received a copy of the GNU General Public License        #
+#    along with this program. If not, see <http://www.gnu.org/licenses/>.     #
+#                                                                             #
+###############################################################################
+
+from typing import Optional, Dict, Tuple, Generator, Set
 
 from .exceptions import DuplicateNode, DuplicateEdge
 
@@ -14,7 +31,7 @@ def __init__(self):
         self._edge_id = 0  # type: int
 
     def add_node(self, key, attrs=None):
-        # type: (Hashable, Optional[dict]) -> None
+        # type: (str, Optional[dict]) -> None
         """Add a node to the graph.
 
         Parameters
@@ -106,7 +123,7 @@ def iter_nodes(self):
         -------
         Generator[Node]
             Yields all nodes in the graph."""
-        for node in self._nodes.values():
+        for node in sorted(self._nodes.values(), key=lambda n: n._node_id):
             yield node
 
     def iter_edges(self):
@@ -117,7 +134,7 @@ def iter_edges(self):
         -------
         Generator[Edge]
             Yields all edges in the graph."""
-        for edge in self._edges.values():
+        for edge in sorted(self._edges.values(), key=lambda e: e._edge_id):
             yield edge
 
 
diff --git a/vtracker/vtracker.py b/vtracker/vtracker.py
index 24f8b12..3e9ace4 100644
--- a/vtracker/vtracker.py
+++ b/vtracker/vtracker.py
@@ -1,6 +1,23 @@
+###############################################################################
+#                                                                             #
+#    This program is free software: you can redistribute it and/or modify     #
+#    it under the terms of the GNU General Public License as published by     #
+#    the Free Software Foundation, either version 3 of the License, or        #
+#    (at your option) any later version.                                      #
+#                                                                             #
+#    This program is distributed in the hope that it will be useful,          #
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of           #
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the            #
+#    GNU General Public License for more details.                             #
+#                                                                             #
+#    You should have received a copy of the GNU General Public License        #
+#    along with this program. If not, see <http://www.gnu.org/licenses/>.     #
+#                                                                             #
+###############################################################################
+
 from collections import defaultdict
 
-from typing import Iterable, Dict, Tuple, Union, Set, List
+from typing import Iterable, Dict, Tuple, Set, List
 
 from .exceptions import MissingVersion, DuplicateEntity
 from .graph import Graph