diff --git a/Dockerfile b/Dockerfile
index 6ee5336..f2c32d8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 FROM ruby:3.2-slim
 
 RUN apt-get update -qq && \
-    apt-get install -y build-essential libmariadb-dev git curl && \
+    apt-get install -y build-essential libmariadb-dev libyaml-dev git curl && \
     rm -rf /var/lib/apt/lists/*
 
 WORKDIR /app