diff --git a/Dockerfile b/Dockerfile
index 93e7dc8..0c7ccaf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@ RUN GOOS=linux GOARCH=amd64 CGO_ENABLED=0 go build
 
 FROM alpine:3.14
 
-RUN apk add --no-cache ca-certificates
+RUN apk add --no-cache ca-certificates tzdata
 
 COPY --from=builder /go/src/drone-email/drone-email /bin/
 ENTRYPOINT ["/bin/drone-email"]
diff --git a/Dockerfile.armhf b/Dockerfile.armhf
index 1aed87e..7392d9a 100644
--- a/Dockerfile.armhf
+++ b/Dockerfile.armhf
@@ -7,7 +7,7 @@ RUN GOOS=linux GOARCH=arm GOARM=7 CGO_ENABLED=0 go build
 
 FROM alpine:3.14
 
-RUN apk add --no-cache ca-certificates
+RUN apk add --no-cache ca-certificates tzdata
 
 COPY --from=builder /go/src/drone-email/drone-email /bin/
 ENTRYPOINT ["/bin/drone-email"]