diff --git a/Dockerfile b/Dockerfile
index a363a01..68026f0 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -18,7 +18,7 @@ FROM base AS build
 
 # Install packages needed to build gems
 RUN apt-get update -qq && \
-    apt-get install --no-install-recommends -y build-essential git libvips pkg-config libpq-dev nodejs npm yarn
+    apt-get install --no-install-recommends -y build-essential git libvips pkg-config libpq-dev libyaml-dev nodejs npm yarn
 
 # Install application gems
 COPY Gemfile Gemfile.lock ./