diff --git a/Dockerfile b/Dockerfile
index 6682143..3f01b97 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,9 @@
 # -------------- Build-time variables --------------
-ARG MASTODON_VERSION=3.4.1
+ARG MASTODON_VERSION=3.4.3
 ARG MASTODON_REPOSITORY=tootsuite/mastodon
 
-ARG RUBY_VERSION=2.7.4
-ARG NODE_VERSION=14.17.3
+ARG RUBY_VERSION=2.7
+ARG NODE_VERSION=14
 ARG ALPINE_VERSION=3.14
 ARG HARDENED_MALLOC_VERSION=8
 ARG LIBICONV_VERSION=1.16