diff --git a/src/sagemaker/workflow/_repack_model.py b/src/sagemaker/workflow/_repack_model.py
index 79b3fa0c0f..60b74d66c7 100644
--- a/src/sagemaker/workflow/_repack_model.py
+++ b/src/sagemaker/workflow/_repack_model.py
@@ -34,15 +34,19 @@
 from distutils.dir_util import copy_tree
 
 
-if __name__ == "__main__":
-    parser = argparse.ArgumentParser()
-    parser.add_argument("--inference_script", type=str, default="inference.py")
-    parser.add_argument("--model_archive", type=str, default="model.tar.gz")
-    args = parser.parse_args()
+def repack(inference_script, model_archive, dependencies=None, source_dir=None):
+    """Repack custom dependencies and code into an existing model TAR archive
+
+    Args:
+        inference_script (str): The path to the custom entry point.
+        model_archive (str): The name of the model TAR archive.
+        dependencies (str): A space-delimited string of paths to custom dependencies.
+        source_dir (str): The path to a custom source directory.
+    """
 
     # the data directory contains a model archive generated by a previous training job
     data_directory = "/opt/ml/input/data/training"
-    model_path = os.path.join(data_directory, args.model_archive)
+    model_path = os.path.join(data_directory, model_archive)
 
     # create a temporary directory
     with tempfile.TemporaryDirectory() as tmp:
@@ -51,17 +55,53 @@
         shutil.copy2(model_path, local_path)
         src_dir = os.path.join(tmp, "src")
         # create the "code" directory which will contain the inference script
-        os.makedirs(os.path.join(src_dir, "code"))
+        code_dir = os.path.join(src_dir, "code")
+        os.makedirs(code_dir)
         # extract the contents of the previous training job's model archive to the "src"
         # directory of this training job
         with tarfile.open(name=local_path, mode="r:gz") as tf:
             tf.extractall(path=src_dir)
 
-        # generate a path to the custom inference script
-        entry_point = os.path.join("/opt/ml/code", args.inference_script)
-        # copy the custom inference script to the "src" dir
-        shutil.copy2(entry_point, os.path.join(src_dir, "code", args.inference_script))
+        # copy the custom inference script to code/
+        entry_point = os.path.join("/opt/ml/code", inference_script)
+        shutil.copy2(entry_point, os.path.join(src_dir, "code", inference_script))
+
+        # copy source_dir to code/
+        if source_dir:
+            if os.path.exists(code_dir):
+                shutil.rmtree(code_dir)
+                shutil.copytree(source_dir, code_dir)
+
+        # copy any dependencies to code/lib/
+        if dependencies:
+            for dependency in dependencies.split(" "):
+                actual_dependency_path = os.path.join("/opt/ml/code", dependency)
+                lib_dir = os.path.join(code_dir, "lib")
+                if not os.path.exists(lib_dir):
+                    os.mkdir(lib_dir)
+                if os.path.isdir(actual_dependency_path):
+                    shutil.copytree(
+                        actual_dependency_path,
+                        os.path.join(lib_dir, os.path.basename(actual_dependency_path)),
+                    )
+                else:
+                    shutil.copy2(actual_dependency_path, lib_dir)
 
         # copy the "src" dir, which includes the previous training job's model and the
         # custom inference script, to the output of this training job
         copy_tree(src_dir, "/opt/ml/model")
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser()
+    parser.add_argument("--inference_script", type=str, default="inference.py")
+    parser.add_argument("--dependencies", type=str, default=None)
+    parser.add_argument("--source_dir", type=str, default=None)
+    parser.add_argument("--model_archive", type=str, default="model.tar.gz")
+    args, extra = parser.parse_known_args()
+    repack(
+        inference_script=args.inference_script,
+        dependencies=args.dependencies,
+        source_dir=args.source_dir,
+        model_archive=args.model_archive,
+    )
diff --git a/src/sagemaker/workflow/_utils.py b/src/sagemaker/workflow/_utils.py
index c5fd461602..04cd2349fe 100644
--- a/src/sagemaker/workflow/_utils.py
+++ b/src/sagemaker/workflow/_utils.py
@@ -145,6 +145,11 @@ def __init__(
         self._source_dir = source_dir
         self._dependencies = dependencies
 
+        # convert dependencies array into space-delimited string
+        dependencies_hyperparameter = None
+        if self._dependencies:
+            dependencies_hyperparameter = " ".join(self._dependencies)
+
         # the real estimator and inputs
         repacker = SKLearn(
             framework_version=FRAMEWORK_VERSION,
@@ -157,6 +162,8 @@ def __init__(
             hyperparameters={
                 "inference_script": self._entry_point_basename,
                 "model_archive": self._model_archive,
+                "dependencies": dependencies_hyperparameter,
+                "source_dir": self._source_dir,
             },
             subnets=subnets,
             security_group_ids=security_group_ids,
diff --git a/tests/unit/sagemaker/workflow/test_repack_model_script.py b/tests/unit/sagemaker/workflow/test_repack_model_script.py
new file mode 100644
index 0000000000..67c8231dcc
--- /dev/null
+++ b/tests/unit/sagemaker/workflow/test_repack_model_script.py
@@ -0,0 +1,174 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You
+# may not use this file except in compliance with the License. A copy of
+# the License is located at
+#
+#     http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file is
+# distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF
+# ANY KIND, either express or implied. See the License for the specific
+# language governing permissions and limitations under the License.
+# language governing permissions and limitations under the License.
+from __future__ import absolute_import
+from sagemaker.workflow import _repack_model
+
+from pathlib import Path
+import shutil
+import tarfile
+import os
+import pytest
+import time
+
+
+@pytest.mark.skip(
+    reason="""This test operates on the root file system
+                            and will likely fail due to permission errors.
+                            Temporarily remove this skip decorator and run
+                            the test after making changes to _repack_model.py"""
+)
+def test_repack_entry_point_only(tmp):
+    model_name = "xg-boost-model"
+    fake_model_path = os.path.join(tmp, model_name)
+
+    # create a fake model
+    open(fake_model_path, "w")
+
+    # create model.tar.gz
+    model_tar_name = "model-%s.tar.gz" % time.time()
+    model_tar_location = os.path.join(tmp, model_tar_name)
+    with tarfile.open(model_tar_location, mode="w:gz") as t:
+        t.add(fake_model_path, arcname=model_name)
+
+    # move model.tar.gz to /opt/ml/input/data/training
+    Path("/opt/ml/input/data/training").mkdir(parents=True, exist_ok=True)
+    shutil.move(model_tar_location, os.path.join("/opt/ml/input/data/training", model_tar_name))
+
+    # create files that will be added to model.tar.gz
+    create_file_tree(
+        "/opt/ml/code",
+        [
+            "inference.py",
+        ],
+    )
+
+    # repack
+    _repack_model.repack(inference_script="inference.py", model_archive=model_tar_name)
+
+    # /opt/ml/model should now have the original model and the inference script
+    assert os.path.exists(os.path.join("/opt/ml/model", model_name))
+    assert os.path.exists(os.path.join("/opt/ml/model/code", "inference.py"))
+
+
+@pytest.mark.skip(
+    reason="""This test operates on the root file system
+                            and will likely fail due to permission errors.
+                            Temporarily remove this skip decorator and run
+                            the test after making changes to _repack_model.py"""
+)
+def test_repack_with_dependencies(tmp):
+    model_name = "xg-boost-model"
+    fake_model_path = os.path.join(tmp, model_name)
+
+    # create a fake model
+    open(fake_model_path, "w")
+
+    # create model.tar.gz
+    model_tar_name = "model-%s.tar.gz" % time.time()
+    model_tar_location = os.path.join(tmp, model_tar_name)
+    with tarfile.open(model_tar_location, mode="w:gz") as t:
+        t.add(fake_model_path, arcname=model_name)
+
+    # move model.tar.gz to /opt/ml/input/data/training
+    Path("/opt/ml/input/data/training").mkdir(parents=True, exist_ok=True)
+    shutil.move(model_tar_location, os.path.join("/opt/ml/input/data/training", model_tar_name))
+
+    # create files that will be added to model.tar.gz
+    create_file_tree(
+        "/opt/ml/code",
+        ["inference.py", "dependencies/a", "bb", "dependencies/some/dir/b"],
+    )
+
+    # repack
+    _repack_model.repack(
+        inference_script="inference.py",
+        model_archive=model_tar_name,
+        dependencies=["dependencies/a", "bb", "dependencies/some/dir"],
+    )
+
+    # /opt/ml/model should now have the original model and the inference script
+    assert os.path.exists(os.path.join("/opt/ml/model", model_name))
+    assert os.path.exists(os.path.join("/opt/ml/model/code", "inference.py"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/lib", "a"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/lib", "bb"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/lib/dir", "b"))
+
+
+@pytest.mark.skip(
+    reason="""This test operates on the root file system
+                            and will likely fail due to permission errors.
+                            Temporarily remove this skip decorator and run
+                            the test after making changes to _repack_model.py"""
+)
+def test_repack_with_source_dir_and_dependencies(tmp):
+    model_name = "xg-boost-model"
+    fake_model_path = os.path.join(tmp, model_name)
+
+    # create a fake model
+    open(fake_model_path, "w")
+
+    # create model.tar.gz
+    model_tar_name = "model-%s.tar.gz" % time.time()
+    model_tar_location = os.path.join(tmp, model_tar_name)
+    with tarfile.open(model_tar_location, mode="w:gz") as t:
+        t.add(fake_model_path, arcname=model_name)
+
+    # move model.tar.gz to /opt/ml/input/data/training
+    Path("/opt/ml/input/data/training").mkdir(parents=True, exist_ok=True)
+    shutil.move(model_tar_location, os.path.join("/opt/ml/input/data/training", model_tar_name))
+
+    # create files that will be added to model.tar.gz
+    create_file_tree(
+        "/opt/ml/code",
+        [
+            "inference.py",
+            "dependencies/a",
+            "bb",
+            "dependencies/some/dir/b",
+            "sourcedir/foo.py",
+            "sourcedir/some/dir/a",
+        ],
+    )
+
+    # repack
+    _repack_model.repack(
+        inference_script="inference.py",
+        model_archive=model_tar_name,
+        dependencies=["dependencies/a", "bb", "dependencies/some/dir"],
+        source_dir="sourcedir",
+    )
+
+    # /opt/ml/model should now have the original model and the inference script
+    assert os.path.exists(os.path.join("/opt/ml/model", model_name))
+    assert os.path.exists(os.path.join("/opt/ml/model/code", "inference.py"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/lib", "a"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/lib", "bb"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/lib/dir", "b"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/", "foo.py"))
+    assert os.path.exists(os.path.join("/opt/ml/model/code/some/dir", "a"))
+
+
+def create_file_tree(root, tree):
+    for file in tree:
+        try:
+            os.makedirs(os.path.join(root, os.path.dirname(file)))
+        except:  # noqa: E722 Using bare except because p2/3 incompatibility issues.
+            pass
+        with open(os.path.join(root, file), "a") as f:
+            f.write(file)
+
+
+@pytest.fixture()
+def tmp(tmpdir):
+    yield str(tmpdir)
diff --git a/tests/unit/sagemaker/workflow/test_step_collections.py b/tests/unit/sagemaker/workflow/test_step_collections.py
index 29540ae10f..a9b0bcff46 100644
--- a/tests/unit/sagemaker/workflow/test_step_collections.py
+++ b/tests/unit/sagemaker/workflow/test_step_collections.py
@@ -366,6 +366,7 @@ def test_register_model_sip(estimator, model_metrics):
 
 def test_register_model_with_model_repack_with_estimator(estimator, model_metrics):
     model_data = f"s3://{BUCKET}/model.tar.gz"
+    dummy_requirements = f"{DATA_DIR}/dummy_requirements.txt"
     register_model = RegisterModel(
         name="RegisterModelStep",
         estimator=estimator,
@@ -379,6 +380,7 @@ def test_register_model_with_model_repack_with_estimator(estimator, model_metric
         approval_status="Approved",
         description="description",
         entry_point=f"{DATA_DIR}/dummy_script.py",
+        dependencies=[dummy_requirements],
         depends_on=["TestStep"],
         tags=[{"Key": "myKey", "Value": "myValue"}],
     )
@@ -405,6 +407,7 @@ def test_register_model_with_model_repack_with_estimator(estimator, model_metric
                     },
                     "HyperParameters": {
                         "inference_script": '"dummy_script.py"',
+                        "dependencies": f'"{dummy_requirements}"',
                         "model_archive": '"model.tar.gz"',
                         "sagemaker_submit_directory": '"s3://{}/{}/source/sourcedir.tar.gz"'.format(
                             BUCKET, repacker_job_name.replace('"', "")
@@ -413,6 +416,7 @@ def test_register_model_with_model_repack_with_estimator(estimator, model_metric
                         "sagemaker_container_log_level": "20",
                         "sagemaker_job_name": repacker_job_name,
                         "sagemaker_region": f'"{REGION}"',
+                        "source_dir": "null",
                     },
                     "InputDataConfig": [
                         {
@@ -528,6 +532,8 @@ def test_register_model_with_model_repack_with_model(model, model_metrics):
                         "sagemaker_container_log_level": "20",
                         "sagemaker_job_name": repacker_job_name,
                         "sagemaker_region": f'"{REGION}"',
+                        "dependencies": "null",
+                        "source_dir": "null",
                     },
                     "InputDataConfig": [
                         {
@@ -631,6 +637,7 @@ def test_register_model_with_model_repack_with_pipeline_model(pipeline_model, mo
                         "S3OutputPath": f"s3://{BUCKET}/",
                     },
                     "HyperParameters": {
+                        "dependencies": "null",
                         "inference_script": '"dummy_script.py"',
                         "model_archive": '"model.tar.gz"',
                         "sagemaker_submit_directory": '"s3://{}/{}/source/sourcedir.tar.gz"'.format(
@@ -640,6 +647,7 @@ def test_register_model_with_model_repack_with_pipeline_model(pipeline_model, mo
                         "sagemaker_container_log_level": "20",
                         "sagemaker_job_name": repacker_job_name,
                         "sagemaker_region": f'"{REGION}"',
+                        "source_dir": "null",
                     },
                     "InputDataConfig": [
                         {