diff --git a/jitsi_admin_application_dockerfile.txt b/jitsi_admin_application_dockerfile.txt
index 2c6597d..ecd9e96 100644
--- a/jitsi_admin_application_dockerfile.txt
+++ b/jitsi_admin_application_dockerfile.txt
@@ -28,7 +28,10 @@ RUN apk --no-cache add \
     php83-xsl \
     php83-pcntl \
     php83-posix \
-    php83-sockets
+    php83-sockets \
+    && rm -rf /var/cache/apk/*
+
+RUN sed -i 's/^;date.timezone =.*$/date.timezone = "Europe/Berlin"/' /etc/php83/php.ini
 
 RUN mkdir /etc/service/crond \
     && echo "#!/bin/sh -e" > /etc/service/crond/run \
@@ -79,8 +82,7 @@ RUN wget https://github.com/H2-invent/jitsi-admin/releases/download/${VERSION}/a
 
 RUN apk del unzip \
     && rm artifact.zip \
-    && rm -r var/cache \
-    && rm -rf /var/cache/apk/*
+    && rm -r var/cache
 
 USER nobody