diff --git a/Dockerfile b/Dockerfile
index d101ff120..f3a84f2c8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,6 @@ ARG PYTHON_VERSION=3.9
 
 FROM docker.io/python:${PYTHON_VERSION}-slim as builder
 
-# install the OS build deps
 RUN apt-get update && apt-get install -y \
     build-essential \
     libffi-dev \
@@ -17,22 +16,6 @@ RUN apt-get update && apt-get install -y \
     git \
  && rm -rf /var/lib/apt/lists/*
 
-# Build dependencies that are not available as wheels, to speed up rebuilds
-RUN pip install --prefix="/install" --no-warn-script-location \
-        "frozendict<2.1.2" \
-        jaeger-client \
-        opentracing \
-        # Match the version constraints of Synapse
-        "prometheus_client>=0.4.0,<0.13.0" \
-        psycopg2 \
-        pycparser \
-        pyrsistent \
-        pyyaml \
-        simplejson \
-        threadloop \
-        thrift
-
-# now install synapse and all of the python deps to /install.
 COPY synapse /synapse/synapse/
 COPY scripts /synapse/scripts/
 COPY MANIFEST.in README.rst setup.py synctl /synapse/
@@ -40,13 +23,12 @@ COPY MANIFEST.in README.rst setup.py synctl /synapse/
 RUN pip install --prefix="/install" --no-warn-script-location \
         /synapse[all] \
 	'git+https://github.com/maunium/synapse-simple-antispam#egg=synapse-simple-antispam' \
-	'git+https://github.com/devture/matrix-synapse-shared-secret-auth@e178353ec87c56e0169dd04466d4769da5ed9c46#egg=shared_secret_authenticator'
+	'git+https://github.com/devture/matrix-synapse-shared-secret-auth@v2.0.2#egg=shared_secret_authenticator'
 
 FROM docker.io/python:${PYTHON_VERSION}-slim
 
 RUN apt-get update && apt-get install -y \
     curl \
-    gosu \
     libjpeg62-turbo \
     libpq5 \
     libwebp6 \
@@ -63,5 +45,5 @@ ENV LD_PRELOAD="/usr/lib/x86_64-linux-gnu/libjemalloc.so.2"
 ENTRYPOINT ["python3", "-m", "synapse.app.homeserver"]
 CMD ["--keys-directory", "/data", "-c", "/data/homeserver.yaml"]
 
-HEALTHCHECK --interval=1m --timeout=5s \
+HEALTHCHECK --start-period=5s --interval=1m --timeout=5s \
   CMD curl -fSs http://localhost:8008/health || exit 1