diff --git a/README.md b/README.md
index a3586bf..610d7e7 100644
--- a/README.md
+++ b/README.md
@@ -36,6 +36,7 @@ If you are having any difficulties, We suggest you watch the [getting started vi
 * [Github actions](https://github.com/approvals/ApprovalTests.Python.StarterProject/actions/workflows/test.yml) - CI that runs your tests on Mac, Windows & Linux  
    This is also what powers the green 'passing' badge at the top of this document
 * `requirements.txt` - standard place to include all your [pip dependiences from pypi](https://pypi.org/) 
+* `constraints.txt` - standard pinned versions of pip dependencies, including transitive dependencies
 * `tox.ini' - A working [tox file](https://tox.wiki/en/latest/)
 * `tests` & `project` folders - to keep your production code and tests seperate
 * Sample tests that pass - to get you off to a great start
diff --git a/constraints.txt b/constraints.txt
new file mode 100644
index 0000000..3af09e3
--- /dev/null
+++ b/constraints.txt
@@ -0,0 +1,24 @@
+allpairspy==2.5.0
+approval-utilities==7.2.0
+approvaltests==7.2.0
+attrs==22.1.0
+beautifulsoup4==4.11.1
+certifi==2022.9.24
+charset-normalizer==2.1.1
+colorama==0.4.6
+empty-files==0.0.3
+exceptiongroup==1.0.0
+idna==3.4
+iniconfig==1.1.1
+mrjob==0.7.4
+packaging==21.3
+pluggy==1.0.0
+pyparsing==3.0.9
+pyperclip==1.5.27
+pytest==7.2.0
+PyYAML==6.0
+requests==2.28.1
+six==1.16.0
+soupsieve==2.3.2.post1
+tomli==2.0.1
+urllib3==1.26.12
diff --git a/tox.ini b/tox.ini
index b2c52fb..b643908 100644
--- a/tox.ini
+++ b/tox.ini
@@ -6,6 +6,7 @@ envlist = tests-{py38,py39}
 [testenv]
 commands = python -m pytest {posargs}
 deps = -rrequirements.txt
+setenv = PIP_CONSTRAINT=constraints.txt
 
 [testenv:dev]
 usedevelop = True