diff --git a/setup.py b/setup.py
index 4284678..69ada0a 100755
--- a/setup.py
+++ b/setup.py
@@ -4,13 +4,13 @@
 import subprocess
 
 setup(name="singer-python",
-      version='5.7.0',
+      version='5.7.3',
       description="Singer.io utility library",
       author="Stitch",
       classifiers=['Programming Language :: Python :: 3 :: Only'],
       url="http://singer.io",
       install_requires=[
-          'pytz==2018.4',
+          'pytz>=2018.4',
           'jsonschema==2.6.0',
           'simplejson==3.11.1',
           'python-dateutil>=2.6.0',
diff --git a/singer/metadata.py b/singer/metadata.py
index dd2b85c..6e37a6b 100644
--- a/singer/metadata.py
+++ b/singer/metadata.py
@@ -17,6 +17,11 @@ def write(compiled_metadata, breadcrumb, k, val):
         compiled_metadata.get(breadcrumb).update({k: val})
     else:
         compiled_metadata[breadcrumb] = {k: val}
+
+    # Auto-select all streams. Metadata for a stream will have an empty breadcrumb
+    if not breadcrumb:
+        compiled_metadata.get(breadcrumb).update({"selected": True})
+
     return compiled_metadata
 
 def get(compiled_metadata, breadcrumb, k):
diff --git a/singer/transform.py b/singer/transform.py
index d290386..0e6ba57 100644
--- a/singer/transform.py
+++ b/singer/transform.py
@@ -259,7 +259,7 @@ def _transform(self, data, typ, schema, path):
                                           schema.get(SchemaKey.pattern_properties))
 
         elif typ == "array":
-            return self._transform_array(data, schema["items"], path)
+            return self._transform_array(data, schema.get("items", {}), path)
 
         elif typ == "string":
             if data is not None: