diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 3e6d718a7..49a010d9d 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -283,7 +283,6 @@ jobs:
       - run: sudo apt-get -qq install xmlsec1
       - uses: matrix-org/setup-python-poetry@v1
         with:
-          python-version: ${{ matrix.python-version }}
           extras: "postgres"
       - run: .ci/scripts/test_export_data_command.sh
 
diff --git a/changelog.d/13688.docker b/changelog.d/13688.docker
new file mode 100644
index 000000000..8935e2536
--- /dev/null
+++ b/changelog.d/13688.docker
@@ -0,0 +1 @@
+Update docker image to use a stable version of poetry.
diff --git a/docker/Dockerfile b/docker/Dockerfile
index fa58ae3ac..b87d263cf 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -46,17 +46,8 @@ RUN \
 
 # We install poetry in its own build stage to avoid its dependencies conflicting with
 # synapse's dependencies.
-# We use a specific commit from poetry's master branch instead of our usual 1.1.14,
-# to incorporate fixes to some bugs in `poetry export`. This commit corresponds to
-#    https://github.com/python-poetry/poetry/pull/5156 and
-#    https://github.com/python-poetry/poetry/issues/5141 ;
-# without it, we generate a requirements.txt with incorrect environment markers,
-# which causes necessary packages to be omitted when we `pip install`.
-#
-# NB: In poetry 1.2 `poetry export` will be moved into a plugin; we'll need to also
-# pip install poetry-plugin-export (https://github.com/python-poetry/poetry-plugin-export).
 RUN --mount=type=cache,target=/root/.cache/pip \
-  pip install --user "poetry-core==1.1.0a7" "git+https://github.com/python-poetry/poetry.git@fb13b3a676f476177f7937ffa480ee5cff9a90a5"
+  pip install --user "poetry==1.2.0"
 
 WORKDIR /synapse