diff --git a/Dockerfile b/Dockerfile
index 7e4abe847b1392f80abb505983f11cae1988263e..75f87df89597582a6a7049c7cca4178483c702e4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ ARG NEWS_VERSION="18.0.1"
 ARG QUOTA_WARN_VERSION="1.14.0"
 ARG NOTES_VERSION="4.3.1"
 ARG CONTACTS_VERSION="4.1.0"
-ARG CALENDAR_VERSION="3.2.2"
+ARG CALENDAR_JOB_ID="302994"
 ARG USER_BACKEND_RAW_SQL_VERSION="1.1.1"
 ARG EMAIL_RECOVERY_JOB_ID="294828"
 ARG RAINLOOP_VERSION="7.2.5"
@@ -16,7 +16,7 @@ ARG EA_TAG="1.2.0"
 ARG ECLOUD_LAUNCHER_JOB_ID="294845"
 ARG GOOGLE_INTEGRATION_VERSION="1.0.6"
 
-RUN sed -i 's/22,2,7,1/22,2,7,3/' ${BASE_DIR}/version.php
+RUN sed -i 's/22,2,7,1/22,2,7,4/' ${BASE_DIR}/version.php
 COPY custom_entrypoint.sh /
 RUN chmod +x /custom_entrypoint.sh
 RUN mkdir -p /var/www/skeleton/Documents && mkdir -p /var/www/skeleton/Images
@@ -44,10 +44,12 @@ RUN curl -fsSL -o contacts.tar.gz \
     tar -xf contacts.tar.gz -C ${BASE_DIR}/custom_apps/ && \
     rm contacts.tar.gz;
 
-RUN curl -fsSL -o calendar.tar.gz \
-    "https://github.com/nextcloud-releases/calendar/releases/download/v${CALENDAR_VERSION}/calendar-v${CALENDAR_VERSION}.tar.gz" && \
-    tar -xf calendar.tar.gz -C ${BASE_DIR}/custom_apps/ && \
-    rm calendar.tar.gz;
+# custom Calendar 3.2.3
+RUN curl -fsSL -o calendar.zip \
+    "https://gitlab.e.foundation/e/infra/selfhost/nextcloud-apps/calendar/-/jobs/${CALENDAR_JOB_ID}/artifacts/download" && \
+    unzip calendar.zip && \
+    mv dist/calendar ${BASE_DIR}/custom_apps/ && \
+    rm calendar.zip;
 
 RUN curl -fsSL -o user_backend_sql_raw.tar.gz \
     "https://github.com/PanCakeConnaisseur/user_backend_sql_raw/releases/download/v${USER_BACKEND_RAW_SQL_VERSION}/user_backend_sql_raw.tar.gz" && \
@@ -144,4 +146,4 @@ RUN curl -fsSL -o eCloud-theme.tar.gz \
 RUN sed -i 's/https:\/\/nextcloud.com\/signup\//https:\/\/e\.foundation\/<?php p(\$_\[\x27language\x27\]); ?>\/e-email-invite\//' ${BASE_DIR}/core/templates/layout.public.php
 
 ENTRYPOINT ["/custom_entrypoint.sh"]
-CMD ["php-fpm"]
\ No newline at end of file
+CMD ["php-fpm"]