diff --git a/Dockerfile b/Dockerfile
index f63354869..e4032fd98 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -19,7 +19,7 @@ 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
+    apt-get install --no-install-recommends -y build-essential git libvips pkg-config libyaml-dev
 
 # Install application gems
 COPY Gemfile Gemfile.lock .ruby-version ./