diff --git a/Dockerfile b/Dockerfile
index 199da7a..10fde26 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ FROM alpine:3.12
 
 RUN apk add --no-cache \
     ca-certificates \
+    coreutils \
     curl \
     file \
     iputils \