diff --git a/examples/cache-warmer/Dockerfile b/examples/cache-warmer/Dockerfile
index 0541022..8830407 100644
--- a/examples/cache-warmer/Dockerfile
+++ b/examples/cache-warmer/Dockerfile
@@ -3,7 +3,7 @@ ARG DOCKER_REPOSITORY=local
 FROM ${DOCKER_REPOSITORY}/scyllaridae:${TAG}
 
 RUN apk update && \
-    apk add --no-cache jq==1.7.1-r0
+    apk add --no-cache jq==1.7.1-r0 grep==3.11-r0
 
 COPY cmd.sh /app/
 COPY scyllaridae.yml /app/scyllaridae.yml