diff --git a/aws_lambda_builders/__init__.py b/aws_lambda_builders/__init__.py
index a0adf692b..0b9662f4c 100644
--- a/aws_lambda_builders/__init__.py
+++ b/aws_lambda_builders/__init__.py
@@ -1,5 +1,5 @@
 """
 AWS Lambda Builder Library
 """
-__version__ = '0.4.0'
+__version__ = '0.5.0'
 RPC_PROTOCOL_VERSION = "0.3"
diff --git a/aws_lambda_builders/workflows/java_maven/workflow.py b/aws_lambda_builders/workflows/java_maven/workflow.py
index 9960fb938..f26b02d12 100644
--- a/aws_lambda_builders/workflows/java_maven/workflow.py
+++ b/aws_lambda_builders/workflows/java_maven/workflow.py
@@ -20,7 +20,7 @@ class JavaMavenWorkflow(BaseWorkflow):
                             dependency_manager="maven",
                             application_framework=None)
 
-    EXCLUDED_FILES = (".aws-sam")
+    EXCLUDED_FILES = (".aws-sam", ".git")
 
     def __init__(self,
                  source_dir,
diff --git a/aws_lambda_builders/workflows/python_pip/compat.py b/aws_lambda_builders/workflows/python_pip/compat.py
index ff35cbabe..2eb885f20 100644
--- a/aws_lambda_builders/workflows/python_pip/compat.py
+++ b/aws_lambda_builders/workflows/python_pip/compat.py
@@ -8,15 +8,23 @@ def pip_import_string(python_exe):
     cmd = [
         python_exe,
         "-c",
-        "import pip; assert int(pip.__version__.split('.')[0]) <= 9"
+        "import pip; print(pip.__version__)"
     ]
-    p = os_utils.popen(cmd,stdout=os_utils.pipe, stderr=os_utils.pipe)
-    p.communicate()
+    p = os_utils.popen(cmd, stdout=os_utils.pipe, stderr=os_utils.pipe)
+    stdout, stderr = p.communicate()
+    pip_version = stdout.decode('utf-8').strip()
+    pip_major_version = int(pip_version.split('.')[0])
+    pip_minor_version = int(pip_version.split('.')[1])
+
     # Pip moved its internals to an _internal module in version 10.
     # In order to be compatible with version 9 which has it at at the
     # top level we need to figure out the correct import path here.
-    if p.returncode == 0:
+    if pip_major_version == 9:
         return 'from pip import main'
+    # Pip changed their import structure again in 19.3
+    # https://github.com/pypa/pip/commit/09fd200
+    elif pip_major_version >= 19 and pip_minor_version >= 3:
+        return 'from pip._internal.main import main'
     else:
         return 'from pip._internal import main'
 
diff --git a/aws_lambda_builders/workflows/python_pip/workflow.py b/aws_lambda_builders/workflows/python_pip/workflow.py
index a3225ce66..5d5cee0c7 100644
--- a/aws_lambda_builders/workflows/python_pip/workflow.py
+++ b/aws_lambda_builders/workflows/python_pip/workflow.py
@@ -39,7 +39,7 @@ class PythonPipWorkflow(BaseWorkflow):
                       ".python-version",
 
                       # mypy, Pyre
-                      ".mypy_cache", ".dmypy.json", ".pyre"
+                      ".mypy_cache", ".dmypy.json", ".pyre",
 
                       # environments
                       ".env", ".venv", "venv", "venv.bak", "env.bak", "ENV",
diff --git a/tests/unit/workflows/java_maven/test_workflow.py b/tests/unit/workflows/java_maven/test_workflow.py
index b4f89fbfc..e2cdacc52 100644
--- a/tests/unit/workflows/java_maven/test_workflow.py
+++ b/tests/unit/workflows/java_maven/test_workflow.py
@@ -42,3 +42,12 @@ def test_workflow_sets_up_validators(self):
         self.assertEqual(len(validators), 1)
 
         self.assertIsInstance(validators[0], MavenValidator)
+
+    def test_workflow_excluded_files(self):
+        workflow = JavaMavenWorkflow("source", "artifacts", "scratch_dir", "manifest")
+
+        self.assertIsInstance(workflow.actions[0], CopySourceAction)
+
+        self.assertEqual(".aws-sam", workflow.actions[0].excludes[0])
+
+        self.assertEqual(".git", workflow.actions[0].excludes[1])
diff --git a/tests/unit/workflows/python_pip/test_packager.py b/tests/unit/workflows/python_pip/test_packager.py
index 937f52aad..452d23987 100644
--- a/tests/unit/workflows/python_pip/test_packager.py
+++ b/tests/unit/workflows/python_pip/test_packager.py
@@ -1,5 +1,6 @@
 import sys
 from collections import namedtuple
+from unittest import TestCase
 
 import mock
 import pytest
@@ -70,7 +71,7 @@ def osutils():
 
 class FakePopen(object):
     def __init__(self, rc, out, err):
-        self.returncode = 0
+        self.returncode = rc
         self._out = out
         self._err = err
 
@@ -303,14 +304,24 @@ def test_inject_unknown_error_if_no_stderr(self, pip_factory):
         assert str(einfo.value) == 'Unknown error'
 
 
-class TestSubprocessPip(object):
+class TestSubprocessPip(TestCase):
     def test_does_use_custom_pip_import_string(self):
         fake_osutils = FakePopenOSUtils([FakePopen(0, '', '')])
         expected_import_statement = 'foobarbaz'
         pip = SubprocessPip(osutils=fake_osutils,
-                            import_string=expected_import_statement)
+                            import_string=expected_import_statement,
+                            python_exe=sys.executable)
         pip.main(['--version'])
 
         pip_execution_string = fake_osutils.popens[0][0][0][2]
         import_statement = pip_execution_string.split(';')[1].strip()
         assert import_statement == expected_import_statement
+
+    def test_check_pip_runner_string_pip(self):
+        fake_osutils = FakePopenOSUtils([FakePopen(0, '', '')])
+        pip = SubprocessPip(osutils=fake_osutils,
+                            python_exe=sys.executable)
+        pip.main(['--version'])
+
+        pip_runner_string = fake_osutils.popens[0][0][0][2].split(";")[-1:][0]
+        self.assertIn("main", pip_runner_string)