diff --git a/Dockerfile b/Dockerfile
index e52913a..d19f3ae 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,6 +7,7 @@ RUN apt-get update && apt-get install -y \
     libkrb5-dev \
     libsodium-dev \
     libsqlite3-dev \
+		libonig-dev \
     libxslt-dev \
     libcurl4-openssl-dev \
     && rm -rf /var/lib/apt/lists/*