diff --git a/omnibus.gemspec b/omnibus.gemspec
index 9e0869eba..d95025e9d 100644
--- a/omnibus.gemspec
+++ b/omnibus.gemspec
@@ -32,6 +32,10 @@ Gem::Specification.new do |gem|
   gem.add_dependency "contracts",        ">= 0.16.0", "< 0.17.0"
   gem.add_dependency "rexml",            "~> 3.2"
 
+  if Gem::Version.new(RUBY_VERSION) <= Gem::Version.new("3.1.0")
+    gem.add_dependency "ffi", "< 1.17.0"
+  end
+
   gem.add_dependency "mixlib-versioning"
   gem.add_dependency "pedump"