diff --git a/Dockerfile b/Dockerfile
index 78fe2e9..0e6c0b6 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -38,6 +38,7 @@ RUN tlmgr update --self && \
 
 RUN apk upgrade && apk add --no-cache \
     bash \
+    coreutils \
     git \
     nodejs \
     npm \