diff --git a/README.rst b/README.rst
index d646153516..ab62eddad0 100644
--- a/README.rst
+++ b/README.rst
@@ -90,6 +90,7 @@ SageMaker Python SDK is tested on:
 - Python 3.6
 - Python 3.7
 - Python 3.8
+- Python 3.9
 
 AWS Permissions
 ~~~~~~~~~~~~~~~
diff --git a/setup.py b/setup.py
index 2eb5838a64..df10a002af 100644
--- a/setup.py
+++ b/setup.py
@@ -33,7 +33,7 @@ def read_version():
 
 # Declare minimal set for installation
 required_packages = [
-    "attrs",
+    "attrs==20.3.0",
     "boto3>=1.20.21",
     "google-pasta",
     "numpy>=1.9.0",
@@ -49,12 +49,12 @@ def read_version():
 # Specific use case dependencies
 extras = {
     "local": [
-        "urllib3>=1.21.1,!=1.25,!=1.25.1",
-        "docker-compose>=1.25.2",
-        "docker==5.0.0",
-        "PyYAML>=5.3, <6",  # PyYAML version has to match docker-compose requirements
+        "urllib3==1.26.8",
+        "docker-compose==1.29.2",
+        "docker~=5.0.0",
+        "PyYAML==5.4.1",  # PyYAML version has to match docker-compose requirements
     ],
-    "scipy": ["scipy>=0.19.0"],
+    "scipy": ["scipy==1.5.4"],
 }
 # Meta dependency groups
 extras["all"] = [item for group in extras.values() for item in group]
@@ -62,23 +62,25 @@ def read_version():
 extras["test"] = (
     [
         extras["all"],
-        "tox",
-        "flake8",
-        "pytest<6.1.0",
-        "pytest-cov",
-        "pytest-rerunfailures",
-        "pytest-timeout",
+        "tox==3.24.5",
+        "flake8==4.0.1",
+        "pytest==6.0.2",
+        "pytest-cov==3.0.0",
+        "pytest-rerunfailures==10.2",
+        "pytest-timeout==2.1.0",
         "pytest-xdist==2.4.0",
-        "coverage<6.2",
-        "mock",
-        "contextlib2",
-        "awslogs",
-        "black",
+        "coverage>=5.2, <6.2",
+        "mock==4.0.3",
+        "contextlib2==21.6.0",
+        "awslogs==0.14.0",
+        "black==22.1.0",
         "stopit==1.1.2",
-        "apache-airflow==1.10.11",
-        "fabric>=2.0",
-        "requests>=2.20.0, <3",
-        "sagemaker-experiments",
+        "apache-airflow==2.2.3",
+        "apache-airflow-providers-amazon==3.0.0",
+        "attrs==20.3.0",
+        "fabric==2.6.0",
+        "requests==2.27.1",
+        "sagemaker-experiments==0.1.35",
     ],
 )
 
diff --git a/tox.ini b/tox.ini
index 50c75cf18c..a0379214a2 100644
--- a/tox.ini
+++ b/tox.ini
@@ -59,7 +59,7 @@ markers =
     timeout: mark a test as a timeout.
 
 [testenv]
-pip_version = pip==20.2
+pip_version = pip==21.3
 passenv =
     AWS_ACCESS_KEY_ID
     AWS_SECRET_ACCESS_KEY
@@ -80,8 +80,8 @@ depends =
 skipdist = true
 skip_install = true
 deps =
-    flake8
-    flake8-future-import
+    flake8==4.0.1
+    flake8-future-import==0.4.6
 commands = flake8
 
 [testenv:pylint]
@@ -106,7 +106,7 @@ commands =
 # twine check was added starting in 1.12.0
 # https://github.com/pypa/twine/blob/master/docs/changelog.rst
 deps =
-    twine>=1.12.0
+    twine==3.8.0
 # https://packaging.python.org/guides/making-a-pypi-friendly-readme/#validating-restructuredtext-markup
 commands =
     python setup.py sdist
@@ -118,15 +118,15 @@ changedir = doc
 # having the requirements.txt installed in deps above results in Double Requirement exception
 # https://github.com/pypa/pip/issues/988
 deps =
-    pip==20.2
+    pip==21.3
 commands =
     pip install --exists-action=w -r requirements.txt
     sphinx-build -T -W -b html -d _build/doctrees-readthedocs -D language=en . _build/html
 
 [testenv:doc8]
 deps =
-    doc8
-    Pygments
+    doc8==0.10.1
+    Pygments==2.11.2
 commands = doc8
 
 [testenv:black-format]
@@ -134,7 +134,7 @@ commands = doc8
 setenv =
     LC_ALL=C.UTF-8
     LANG=C.UTF-8
-deps = black
+deps = black==22.1.0
 commands =
     black -l 100 ./
 
@@ -143,12 +143,12 @@ commands =
 setenv =
     LC_ALL=C.UTF-8
     LANG=C.UTF-8
-deps = black
+deps = black==22.1.0
 commands =
     black -l 100 --check ./
 
 [testenv:clean]
-deps = coverage
+deps = coverage==6.2
 skip_install = true
 commands = coverage erase
 
@@ -158,7 +158,7 @@ commands =
     mypy src/sagemaker
 
 [testenv:docstyle]
-deps = pydocstyle
+deps = pydocstyle==6.1.1
 commands =
     pydocstyle src/sagemaker