diff --git a/Dockerfile b/Dockerfile
index 3289c5b..d7bdac4 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@ MAINTAINER ich777
 
 RUN dpkg --add-architecture i386
 RUN apt-get update
-RUN apt-get -y install lib32gcc1 wget
+RUN apt-get -y install lib32gcc1 wget mono-complete
 
 ENV DATA_DIR="/serverdata"
 ENV STEAMCMD_DIR="${DATA_DIR}/steamcmd"