diff --git a/ruby/ruby-sdl2 b/ruby/ruby-sdl2
index d82bd748641..7fa39dd85f1 160000
--- a/ruby/ruby-sdl2
+++ b/ruby/ruby-sdl2
@@ -1 +1 @@
-Subproject commit d82bd748641314922df39c7ab40dee3b91a3e156
+Subproject commit 7fa39dd85f1f2902bffc20be05be404b1bcd2d63
diff --git a/ruby/smalruby3/.gitignore b/ruby/smalruby3/.gitignore
index cb44f426ef9..78aa7c34573 100644
--- a/ruby/smalruby3/.gitignore
+++ b/ruby/smalruby3/.gitignore
@@ -14,5 +14,8 @@ ext/smalruby3_launcher/smalruby3_launcher.o
 ext/smalruby3_launcher/Makefile
 ext/smalruby3_launcher/mkmf.log
 
+# Bundle lock (gem library)
+Gemfile.lock
+
 # Docker marker
 .built