diff --git a/plugins/rss/Dockerfile b/plugins/rss/Dockerfile
index 991b3737fa..f1df044c8e 100644
--- a/plugins/rss/Dockerfile
+++ b/plugins/rss/Dockerfile
@@ -7,6 +7,6 @@ ENV TRANSMISSION_DOWNLOAD_DIR=/data/completed \
     RSS_REGEXP=
 
 # Install build-base and transmission-rss gem
-RUN apk add build-base bash && gem install transmission-rss
+RUN apk add build-base bash && gem install ffi -v 1.16.3 && gem install transmission-rss
 
 ADD . /etc/transmission-rss