diff --git a/bindings/ruby/extsources.rb b/bindings/ruby/extsources.rb
index 1dc900d4..698648fb 100644
--- a/bindings/ruby/extsources.rb
+++ b/bindings/ruby/extsources.rb
@@ -1,6 +1,6 @@
 require "yaml"
 
-sources = `git ls-files -z ../..`.split("\x0")
+sources = `git ls-files -z ../.. --recurse-submodules`.split("\x0")
 paths = YAML.load_file("../../.github/workflows/bindings-ruby.yml")[true]["push"]["paths"]
 paths.delete "bindings/ruby/**"
 EXTSOURCES = (Dir.glob(paths, base: "../..").collect {|path| "../../#{path}"} << "../../LICENSE") & sources