diff --git a/logstash/8.16.0/batch/Dockerfile b/logstash/8.16.0/batch/Dockerfile
index 728343e..0dd1c73 100644
--- a/logstash/8.16.0/batch/Dockerfile
+++ b/logstash/8.16.0/batch/Dockerfile
@@ -12,7 +12,7 @@ RUN apt-get update && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/* && \
     apt-get -y --no-install-recommends install \
-    ruby-full && \
+    ruby-full=2.7.8 && \
     gem install sinatra -v 4.1.0
 
 USER 1000
\ No newline at end of file