diff --git a/cmd/s3driver/Dockerfile.s3ql b/cmd/s3driver/Dockerfile.s3ql
index da52a29..c631f09 100644
--- a/cmd/s3driver/Dockerfile.s3ql
+++ b/cmd/s3driver/Dockerfile.s3ql
@@ -5,7 +5,7 @@ ARG S3QL_VERSION=release-2.28
 
 RUN apt-get update && \
     apt-get install -y \
-      s3fs wget psmisc python3 python3-setuptools \
+      s3fs wget psmisc procps python3 python3-setuptools \
       python3-dev python3-pip python3-llfuse pkg-config \
       sqlite3 libsqlite3-dev python3-apsw cython && \
     rm -rf /var/lib/apt/lists/*
diff --git a/test/Dockerfile b/test/Dockerfile
index c128ab4..c61c431 100644
--- a/test/Dockerfile
+++ b/test/Dockerfile
@@ -5,7 +5,7 @@ ARG S3QL_VERSION=release-2.28
 
 RUN apt-get update && \
     apt-get install -y \
-      s3fs wget psmisc python3 python3-setuptools \
+      s3fs wget psmisc procps python3 python3-setuptools \
       python3-dev python3-pip python3-llfuse pkg-config \
       sqlite3 libsqlite3-dev python3-apsw cython && \
     rm -rf /var/lib/apt/lists/*