diff --git a/Dockerfile b/Dockerfile
index 31ca5b6..b3d4d28 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -31,7 +31,17 @@ RUN apk add --no-cache \
     libxml2 \
     libxslt \
     tzdata \
-    dcron
+    curl
+
+ENV SUPERCRONIC_URL=https://github.com/aptible/supercronic/releases/download/v0.2.33/supercronic-linux-amd64 \
+    SUPERCRONIC_SHA1SUM=71b0d58cc53f6bd72cf2f293e09e294b79c666d8 \
+    SUPERCRONIC=supercronic-linux-amd64
+
+RUN curl -fsSLO "$SUPERCRONIC_URL" \
+ && echo "${SUPERCRONIC_SHA1SUM}  ${SUPERCRONIC}" | sha1sum -c - \
+ && chmod +x "$SUPERCRONIC" \
+ && mv "$SUPERCRONIC" "/usr/local/bin/${SUPERCRONIC}" \
+ && ln -s "/usr/local/bin/${SUPERCRONIC}" /usr/local/bin/supercronic
 
 COPY --from=builder /usr/local/lib/python3.10 /usr/local/lib/python3.10
 COPY --from=builder /app /app
@@ -40,6 +50,5 @@ ENV PYTHONPATH=/usr/local/lib/python3.10/site-packages
 
 COPY . .
 
-RUN echo -e "SHELL=/bin/sh\nPATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin\n" > /etc/crontabs/root
-
-CMD echo "${CRON:-0 0 * * *} python /app/cleanmedia.py ${CLEANMEDIA_OPTS:--t 30}" >> /etc/crontabs/root && crond -f -l 2
+CMD echo "${CRON:-0 0 * * *} python /app/cleanmedia.py ${CLEANMEDIA_OPTS:-c /etc/dendrite/dendrite.yaml -t 30 -n -l}" > /app/crontab && \
+    /usr/local/bin/supercronic /app/crontab