diff --git a/Dockerfile b/Dockerfile
index 11f54b5..429303b 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,33 @@
-FROM python:3.11.5-alpine3.18
+FROM python:3.11.5-alpine3.18 AS base
 
-WORKDIR /code
-COPY ./requirements.txt /code/requirements.txt
-RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
-COPY ./gocardless_membership_exporter /code/gocardless_membership_exporter
+FROM base AS builder
 
+ENV PYTHONFAULTHANDLER=1 \
+  PYTHONUNBUFFERED=1 \
+  PYTHONHASHSEED=random \
+  PIP_NO_CACHE_DIR=off \
+  PIP_DISABLE_PIP_VERSION_CHECK=on \
+  PIP_DEFAULT_TIMEOUT=100 \
+  POETRY_NO_INTERACTION=1 \
+  POETRY_VIRTUALENVS_CREATE=false \
+  PATH="$PATH:/runtime/bin" \
+  PYTHONPATH="$PYTHONPATH:/runtime/lib/python3.11/site-packages" \
+  # Versions:
+  POETRY_VERSION=1.5.1
+
+# System deps:
+RUN apk add build-base unzip wget python3-dev libffi-dev
+RUN pip install "poetry==$POETRY_VERSION"
+
+WORKDIR /src
+
+# Generate requirements and install *all* dependencies.
+COPY pyproject.toml poetry.lock /src/
+RUN poetry export --dev --without-hashes --no-interaction --no-ansi -f requirements.txt -o requirements.txt
+RUN pip install --prefix=/runtime --force-reinstall -r requirements.txt
+
+FROM base AS runtime
+COPY --from=builder /runtime /usr/local
+COPY ./gocardless_membership_exporter /app/gocardless_membership_exporter
+WORKDIR /app
 CMD ["python", "-m", "gocardless_membership_exporter"]
\ No newline at end of file
diff --git a/poetry.lock b/poetry.lock
new file mode 100644
index 0000000..6c9dd45
--- /dev/null
+++ b/poetry.lock
@@ -0,0 +1,434 @@
+# This file is automatically @generated by Poetry 1.4.1 and should not be changed by hand.
+
+[[package]]
+name = "annotated-types"
+version = "0.6.0"
+description = "Reusable constraint types to use with typing.Annotated"
+category = "main"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "annotated_types-0.6.0-py3-none-any.whl", hash = "sha256:0641064de18ba7a25dee8f96403ebc39113d0cb953a01429249d5c7564666a43"},
+    {file = "annotated_types-0.6.0.tar.gz", hash = "sha256:563339e807e53ffd9c267e99fc6d9ea23eb8443c08f112651963e24e22f84a5d"},
+]
+
+[[package]]
+name = "certifi"
+version = "2023.7.22"
+description = "Python package for providing Mozilla's CA Bundle."
+category = "main"
+optional = false
+python-versions = ">=3.6"
+files = [
+    {file = "certifi-2023.7.22-py3-none-any.whl", hash = "sha256:92d6037539857d8206b8f6ae472e8b77db8058fec5937a1ef3f54304089edbb9"},
+    {file = "certifi-2023.7.22.tar.gz", hash = "sha256:539cc1d13202e33ca466e88b2807e29f4c13049d6d87031a3c110744495cb082"},
+]
+
+[[package]]
+name = "charset-normalizer"
+version = "3.3.2"
+description = "The Real First Universal Charset Detector. Open, modern and actively maintained alternative to Chardet."
+category = "main"
+optional = false
+python-versions = ">=3.7.0"
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diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..f23c6ad
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,24 @@
+[tool.poetry]
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+description = ""
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+
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\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
deleted file mode 100644
index 886e17d..0000000
--- a/requirements.txt
+++ /dev/null
@@ -1,3 +0,0 @@
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\ No newline at end of file