diff --git a/Dockerfile b/Dockerfile
index 0cc56dd..103e221 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -68,6 +68,7 @@ ENV SSHWIFTY_HOSTNAME= \
     SSHWIFTY_ONLYALLOWPRESETREMOTES=
 COPY --from=builder /sshwifty /
 COPY . /sshwifty-src
+RUN apk add --no-cache tzdata
 RUN set -ex && \
     adduser -D sshwifty && \
     chmod +x /sshwifty && \