diff --git a/Dockerfile b/Dockerfile
index 82a234d..4cfe846 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -13,8 +13,5 @@ RUN go build -o bin/ddns \
 
 FROM alpine AS runner
 COPY --from=builder /app/bin/ddns /usr/bin/
-RUN apk --no-cache add --no-check-certificate ca-certificates \
-    && update-ca-certificates
-RUN apk add --no-cache tzdata
 
 ENTRYPOINT /usr/bin/ddns