diff --git a/Dockerfile b/Dockerfile
index a6165a2..290b412 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -20,7 +20,7 @@ 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 libpq-dev libvips pkg-config
+    apt-get install --no-install-recommends -y build-essential git libpq-dev libvips pkg-config libyaml-dev
 
 # Install application gems
 COPY Gemfile Gemfile.lock ./
diff --git a/Dockerfile.dev b/Dockerfile.dev
index 5dbd815..54e6717 100644
--- a/Dockerfile.dev
+++ b/Dockerfile.dev
@@ -13,7 +13,7 @@ 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 libpq-dev libvips pkg-config
+    apt-get install --no-install-recommends -y build-essential git libpq-dev libvips pkg-config libyaml-dev
 
 # Install application gems
 COPY Gemfile Gemfile.lock ./