diff --git a/docker/Dockerfile b/docker/Dockerfile
index b2f1b74..f9c3469 100644
--- a/docker/Dockerfile
+++ b/docker/Dockerfile
@@ -1,13 +1,13 @@
 FROM openjdk:11-slim-buster
 
 # Install swh.graph (both Python and Java parts)
 RUN apt-get update && \
     apt-get install --no-install-recommends --yes \
-        curl time \
+        curl zstd \
         gcc pkg-config libsystemd-dev python3-dev \
         python3-pip python3-setuptools python3-wheel && \
     rm -rf /var/lib/apt/lists/* && \
     pip3 install swh.graph
 
 # Default dir
 WORKDIR /srv/softwareheritage/graph