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diff --git a/develop/development/contributing_guide.html b/develop/development/contributing_guide.html
index fc9a412756..c6e4c274a4 100644
--- a/develop/development/contributing_guide.html
+++ b/develop/development/contributing_guide.html
@@ -187,6 +187,7 @@ pipx install poetry
 </code></pre>
 <p>but see poetry's <a href="https://python-poetry.org/docs/#installation">installation instructions</a>
 for other installation methods.</p>
+<p>Synapse requires Poetry version 1.2.0 or later.</p>
 <p>Next, open a terminal and install dependencies as follows:</p>
 <pre><code class="language-sh">cd path/where/you/have/cloned/the/repository
 poetry install --extras all