diff --git a/scanner/ruby.go b/scanner/ruby.go
index d0a68a64e8..761f203fd4 100644
--- a/scanner/ruby.go
+++ b/scanner/ruby.go
@@ -7,6 +7,7 @@ import (
 	"strings"
 
 	"github.com/pkg/errors"
+	"github.com/superfly/flyctl/internal/command/launch/plan"
 )
 
 func configureRuby(sourceDir string, config *ScannerConfig) (*SourceInfo, error) {
@@ -24,6 +25,8 @@ func configureRuby(sourceDir string, config *ScannerConfig) (*SourceInfo, error)
 		return nil, errors.Wrap(err, "failure extracting Ruby version")
 	}
 
+	s.Runtime = plan.RuntimeStruct{Language: "ruby", Version: rubyVersion}
+
 	vars := make(map[string]interface{})
 	vars["rubyVersion"] = rubyVersion
 	s.Files = templatesExecute("templates/ruby", vars)