diff --git a/Dockerfile b/Dockerfile
index 3f01b97..47a8af9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 # -------------- Build-time variables --------------
-ARG MASTODON_VERSION=3.4.3
+ARG MASTODON_VERSION=3.4.2
 ARG MASTODON_REPOSITORY=tootsuite/mastodon
 
 ARG RUBY_VERSION=2.7