diff --git a/spark/Dockerfile b/spark/Dockerfile
index 223d924..377cd98 100644
--- a/spark/Dockerfile
+++ b/spark/Dockerfile
@@ -26,6 +26,8 @@
     SPARK_MASTER_PORT="7077" \
     SPARK_MASTER_WEBUI_PORT="8080"
 
+COPY spark-defaults.conf $SPARK_HOME/conf
+
 ENV SPARK_MASTER="spark://$SPARK_LOCAL_IP:$SPARK_MASTER_PORT"
 
 # Spark doesn't seem to respond directly to SIGTERM as the exit status is