diff --git a/CHANGELOG.md b/CHANGELOG.md
index 49efa52..6d4a41e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+### [1.2.1] - 2019/05/02
+- Fix #4:
+  - Switch base image from Debian oldoldstable Jessie to Debian stable Buster to fix unmet dependencies of `seafile-cli` to `python-future` and `python-searpc`
+  - Replace `;` with `&&` as commands separators in the Dockerfile's `RUN` to properly report failed commands at CI
+
 ## [1.2.0] - 2019/05/02
 - Replace _supervisord_ with _cron_ for running the front job that keeps the container up. It uses less resources.
 - Improve the __infinite-seaf-cli-start.sh__ into __seafile-healthcheck.sh__. The Seafile daemon will not be restarted if it's state are either _downloading_ or _committing_, which otherwise is problematic.
diff --git a/Dockerfile b/Dockerfile
index 3272c7f..ff1b902 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -14,7 +14,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-FROM debian:jessie-slim
+FROM debian:buster-slim
 
 # Prevent the packages installation to halt.
 ENV DEBIAN_FRONTEND noninteractive
@@ -28,30 +28,35 @@ COPY utils/build/import-seafile-apt-key.sh /
 COPY assets/cron/docker-entrypoint.sh /entrypoint.sh
 
 # Safely import Seafile APT key, then install both seafile-cli and supervisord.
-RUN mkdir -p /etc/apt/sources.list.d/ ;\
-    echo "deb http://deb.seadrive.org jessie main" \
-        > /etc/apt/sources.list.d/seafile.list ;\
-    bash /import-seafile-apt-key.sh ;\
-    apt-get update ;\
+RUN mkdir -p /etc/apt/sources.list.d/ && \
+    apt-get update && \
+    apt-get install -y gnupg && \
+    echo "deb http://deb.seadrive.org buster main" \
+        > /etc/apt/sources.list.d/seafile.list && \
+    bash /import-seafile-apt-key.sh && \
+    apt-get remove -y gnupg && \
+    apt-get autoremove -y && \
+    apt-get update && \
     apt-get install \
         -o Dpkg::Options::="--force-confold" \
         -y \
             seafile-cli \
-            cron ;\
-    apt-get clean ;\
+            cron && \
+    apt-get clean && \
     apt-get autoclean \
-        -o APT::Clean-Installed=true ;\
+        -o APT::Clean-Installed=true && \
     rm \
-        -f \
+        -rf \
             /var/log/fsck/*.log \
             /var/log/apt/*.log \
             /var/cache/debconf/*.dat-old \
-            /import-seafile-apt-key.sh ;\
-    mkdir /volume/ ;\
-    echo "seafuser" > /etc/cron.allow ;\
+            /var/lib/apt/lists/* \
+            /import-seafile-apt-key.sh && \
+    mkdir /volume/ && \
+    echo "seafuser" > /etc/cron.allow && \
     echo "*/20 * * * * /bin/bash /home/seafuser/seafile-healthcheck.sh" \
-        > /var/spool/cron/crontabs/seafuser ;\
-    groupadd -g $GID -o $UNAME ;\
+        > /var/spool/cron/crontabs/seafuser && \
+    groupadd -g $GID -o $UNAME && \
     useradd -m -u $UID -g $GID -o -s /bin/bash $UNAME
 
 # Copy over the required files for Seafile/SupervisorD.
diff --git a/README.md b/README.md
index 57e975d..936f259 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-[![1.2.0 build status](https://gitlab.com/flwgns-docker/seafile-client/badges/1.2.0/pipeline.svg)](https://gitlab.com/flwgns-docker/seafile-client/commits/1.2.0)
+[![1.2.1 build status](https://gitlab.com/flwgns-docker/seafile-client/badges/1.2.1/pipeline.svg)](https://gitlab.com/flwgns-docker/seafile-client/commits/1.2.1)
 [![Docker pulls](https://img.shields.io/docker/pulls/flowgunso/seafile-client.svg)](https://hub.docker.com/r/flowgunso/seafile-client)
 [![Licensed under GPLv3](https://img.shields.io/badge/License-GPLv3-red.svg)](https://www.gnu.org/licenses/gpl-3.0)
 [![@gitlab.com/flwgns-docker/seafile-client](https://img.shields.io/badge/Source%20code-GitLab-red.svg)](https://gitlab.com/flwgns-docker/seafile-client/)
@@ -9,10 +9,10 @@ Weekly stable release are built every Monday at 6AM UTC+2.
 Permanent stable releases will not be built again.
 
 ## Weekly stable releases.
-[`1`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.0),
-[`1.2`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.0),
-[`1.2.0`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.0),
-[`latest`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.0)
+[`1`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.1),
+[`1.2`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.1),
+[`1.2.1`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.1),
+[`latest`](https://gitlab.com/flwgns-docker/seafile-client/tags/1.2.1)
 
 ## Developmental releases.
 [`staging`](https://gitlab.com/flwgns-docker/seafile-client/tree/staging):