diff --git a/docker/syncer/Dockerfile b/docker/syncer/Dockerfile
index a4f7eb4..6b09a3c 100644
--- a/docker/syncer/Dockerfile
+++ b/docker/syncer/Dockerfile
@@ -8,18 +8,26 @@ FROM almalinux:latest
 # python3          -> Interpreter fuer appstream-gen.py
 RUN dnf install -y \
         dnf-plugins-core \
-        createrepo_c \
-        appstream \
-        python3 \
-        git \
-        jq \
-        openssh-clients \
+	    createrepo_c \
+	    appstream \
+	    git \
+	    jq \
+	    openssh-clients \
+	    python3 \
+	    python3-pyyaml \
+	    jq \
+	    cronie \
+	    appstream \
+	    gnupg2 \
+	    rpm-sign \
+	    findutils \
+	    util-linux-core \
+	    curl \
         wget \
     && dnf clean all
 
-RUN wget -q https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 \
-        -O /usr/local/bin/yq \
-    && chmod +x /usr/local/bin/yq
+RUN wget https://github.com/mikefarah/yq/releases/latest/download/yq_linux_amd64 -O /usr/local/bin/yq &&\
+    chmod +x /usr/local/bin/yq
 
 COPY docker/syncer/sync.sh       /usr/local/bin/sync.sh
 COPY docker/syncer/sync_helpers.py /usr/local/bin/sync_helpers.py
@@ -27,6 +35,4 @@ COPY docker/syncer/appstream-gen.py /usr/local/bin/appstream-gen.py
 COPY docker/syncer/entrypoint.sh /entrypoint.sh
 RUN chmod +x /usr/local/bin/sync.sh /entrypoint.sh
 
-# Bewusst kein VOLUME und kein EXPOSE: die Volumes definiert docker-compose.yml,
-# und ausgeliefert wird ueber den separaten nginx-Container.
 ENTRYPOINT ["/entrypoint.sh"]
\ No newline at end of file