diff --git a/docker/docker-py3-kms-minimal/Dockerfile b/docker/docker-py3-kms-minimal/Dockerfile
index 858f62c..7e0a6c2 100644
--- a/docker/docker-py3-kms-minimal/Dockerfile
+++ b/docker/docker-py3-kms-minimal/Dockerfile
@@ -16,18 +16,18 @@ ENV LOGSIZE ""
 COPY ./py-kms /home/py-kms
 
 RUN apk add --no-cache --update \
-	bash \
-	git \
-	py3-argparse \
-	py3-flask \
-	py3-pygments \
-	python3-tkinter \
-	sqlite-libs \
-	py3-pip \
-	tzdata  \
+  bash \
+  git \
+  py3-argparse \
+  py3-flask \
+  py3-pygments \
+  python3-tkinter \
+  sqlite-libs \
+  py3-pip \
+  tzdata  \
   shadow \
   netcat-openbsd \
-	build-base python3-dev \
+  build-base python3-dev \
   && pip3 install --no-cache peewee tzlocal pytz wheel \
   && apk del git build-base python3-dev \
   && addgroup power_users  \
@@ -37,15 +37,16 @@ RUN apk add --no-cache --update \
   # Fix undefined timezone, in case the user did not mount the /etc/localtime
   && ln -sf /usr/share/zoneinfo/UTC /etc/localtime
 
+COPY docker/entrypoint.py /usr/bin/entrypoint.py
+COPY docker/start.py /usr/bin/start.py
+
+RUN chmod 755 /usr/bin/entrypoint.py
+
 WORKDIR /home/py-kms
 
 EXPOSE ${PORT}/tcp
 
-COPY docker/entrypoint.py /usr/bin/entrypoint.py
-COPY docker/start.py /usr/bin/start.py
-
-RUN chmod a+x /usr/bin/entrypoint.py
-HEALTHCHECK --interval=5m --timeout=3s --start-period=10s --retries=4 CMD echo | nc -t localhost ${PORT} || exit 1
+HEALTHCHECK --interval=5m --timeout=3s --start-period=10s --retries=4 CMD echo | nc -z localhost ${PORT} || exit 1
 
 ENTRYPOINT ["/usr/bin/python3", "-u","/usr/bin/entrypoint.py"]
 CMD ["/usr/bin/start.py"]
diff --git a/docker/docker-py3-kms/Dockerfile b/docker/docker-py3-kms/Dockerfile
index c4221ac..16ec7d2 100644
--- a/docker/docker-py3-kms/Dockerfile
+++ b/docker/docker-py3-kms/Dockerfile
@@ -19,33 +19,33 @@ ENV TZ America/Chicago
 COPY py-kms /home/py-kms/
 #hadolint ignore=DL3013,DL3018
 RUN apk add --no-cache --update \
-    bash \
-    git \
-    python3 \
-    py3-argparse \
-    py3-flask \
-    py3-pygments \
-    python3-tkinter \
-    sqlite-libs \
-    py3-pip \
-    build-base python3-dev \
-    ca-certificates \
-    duplicity \
-    tzdata \
-    shadow \
-    netcat-openbsd \
-    && git clone --branch master --depth 1 https://github.com/coleifer/sqlite-web.git /tmp/sqlite_web \
-    && mv /tmp/sqlite_web/sqlite_web /home/  \
-    && rm -rf /tmp/sqlite_web \
-    && pip3 install --no-cache-dir peewee tzlocal pytz pysqlite3 wheel \
-    && apk del git build-base python3-dev \
-    && mkdir /db/ \
-    && addgroup power_users  \
-    && adduser -S py-kms -G users -s /bin/bash \
-    && usermod -a -G power_users py-kms \
-    && chown py-kms:users /home/py-kms \
-    # Fix undefined timezone, in case the user did not mount the /etc/localtime
-    && ln -sf /usr/share/zoneinfo/UTC /etc/localtime
+  bash \
+  git \
+  python3 \
+  py3-argparse \
+  py3-flask \
+  py3-pygments \
+  python3-tkinter \
+  sqlite-libs \
+  py3-pip \
+  build-base python3-dev \
+  ca-certificates \
+  duplicity \
+  tzdata \
+  shadow \
+  netcat-openbsd \
+  && git clone --branch master --depth 1 https://github.com/coleifer/sqlite-web.git /tmp/sqlite_web \
+  && mv /tmp/sqlite_web/sqlite_web /home/  \
+  && rm -rf /tmp/sqlite_web \
+  && pip3 install --no-cache-dir peewee tzlocal pytz pysqlite3 wheel \
+  && apk del git build-base python3-dev \
+  && mkdir /db/ \
+  && addgroup power_users  \
+  && adduser -S py-kms -G users -s /bin/bash \
+  && usermod -a -G power_users py-kms \
+  && chown py-kms:users /home/py-kms \
+  # Fix undefined timezone, in case the user did not mount the /etc/localtime
+  && ln -sf /usr/share/zoneinfo/UTC /etc/localtime
 
 COPY docker/entrypoint.py /usr/bin/entrypoint.py
 COPY docker/start.py /usr/bin/start.py
@@ -57,7 +57,7 @@ WORKDIR /home/py-kms
 EXPOSE ${PORT}/tcp
 EXPOSE 8080
 
-HEALTHCHECK --interval=5m --timeout=3s --start-period=10s --retries=4 CMD echo | nc -t localhost ${PORT} || exit 1
+HEALTHCHECK --interval=5m --timeout=3s --start-period=10s --retries=4 CMD echo | nc -z localhost ${PORT} || exit 1
 
 ENTRYPOINT [ "/usr/bin/python3","-u","/usr/bin/entrypoint.py" ]
 CMD ["/usr/bin/start.py"]