diff --git a/Dockerfile b/Dockerfile
index 56ac98b8dca1a2e6bbee22083ad6fc4c4842db9e..25d6a65ec2f2d75ce37f12e7b52929be5ddcfedf 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -17,7 +17,7 @@ COPY ./ruby/Gemfile.lock /app/ruby/
 
 ENV DEBIAN_FRONTEND noninteractive
 RUN apt-get update -qq && \
-    apt-get install -qq -y rubygems bundler cmake build-essential libicu-dev && \
+    apt-get install -qq -y rubygems bundler cmake build-essential libicu-dev rsync && \
     cd /app/ruby && bundle install --path vendor/bundle && \
     rm -rf /var/lib/apt/lists/*
 
diff --git a/_support/build-images/versioned/Dockerfile b/_support/build-images/versioned/Dockerfile
index ca25a8dc6f7836f702a1ccd61fcf83c54f29b944..cf1f6ab0826df5387f933cd51fa3d10f1f33fe9a 100644
--- a/_support/build-images/versioned/Dockerfile
+++ b/_support/build-images/versioned/Dockerfile
@@ -7,5 +7,5 @@ COPY ./Gemfile /bundle-cache
 COPY ./Gemfile.lock /bundle-cache
 
 RUN DEBIAN_FRONTEND=noninteractive apt-get update -qq && \
-    DEBIAN_FRONTEND=noninteractive apt-get install -qq -y rubygems bundler cmake build-essential libicu-dev && \
+    DEBIAN_FRONTEND=noninteractive apt-get install -qq -y rubygems bundler cmake build-essential libicu-dev rsync && \
     cd /bundle-cache && bundle install --path vendor/bundle