diff --git a/Dockerfile b/Dockerfile
index 64fba83..31dcd64 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM ruby:3-alpine3.13
+FROM ruby:3-alpine3.16
 
 LABEL "com.github.actions.name"="Comment on PR"
 LABEL "com.github.actions.description"="Leaves a comment on an open PR matching a push event."
@@ -7,7 +7,7 @@ LABEL "com.github.actions.maintainer"="Aaron Klaassen <aaron@unsplash.com>"
 LABEL "com.github.actions.icon"="message-square"
 LABEL "com.github.actions.color"="blue"
 
-RUN gem install octokit
+RUN gem install octokit -v 4.25.1
 
 ADD entrypoint.sh /entrypoint.sh
-ENTRYPOINT ["/entrypoint.sh"]
\ No newline at end of file
+ENTRYPOINT ["/entrypoint.sh"]