diff --git a/promtail/Dockerfile b/promtail/Dockerfile
index c3a07e9..c6d327d 100644
--- a/promtail/Dockerfile
+++ b/promtail/Dockerfile
@@ -15,6 +15,7 @@ RUN set -eux; \
     apt-get update; \
     apt-get install -qy --no-install-recommends \ 
         tar \
+        tzdata \
         ; \
     update-ca-certificates; \
     \