diff --git a/Dockerfile b/Dockerfile
index 5f7131a..689e076 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -28,7 +28,7 @@ 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 pkg-config && \
+    apt-get install --no-install-recommends -y build-essential git libpq-dev pkg-config libyaml-dev && \
     rm -rf /var/lib/apt/lists /var/cache/apt/archives
 
 # Install application gems