diff --git a/Dockerfile b/Dockerfile
index 2111034..ba76829 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -66,6 +66,7 @@ RUN apk --update --no-cache add \
     py3-pip \
     rrdtool \
     runit \
+    sed \
     shadow \
     syslog-ng=3.38.1-r0 \
     ttf-dejavu \