diff --git a/Dockerfile b/Dockerfile
index 7649b72..2f6ab2e 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -29,7 +29,7 @@ COPY files/config.ini /etc/mumble/config.ini
 COPY files/supw /usr/local/bin/supw
 
 RUN chmod +x /usr/local/bin/supw
-RUN apk add --update ca-certificates \
+RUN apk add --update ca-certificates tzdata \
     && rm -rf /var/cache/apk/* \
     && chown -R mumble:mumble /etc/mumble /opt/mumble