diff --git a/pkg/runner/expression.go b/pkg/runner/expression.go
index 842fcac..eccfddd 100644
--- a/pkg/runner/expression.go
+++ b/pkg/runner/expression.go
@@ -236,11 +236,15 @@ func vmFromJSON(vm *otto.Otto) {
 
 func (rc *RunContext) vmHashFiles() func(*otto.Otto) {
 	return func(vm *otto.Otto) {
-		_ = vm.Set("hashFiles", func(path string) string {
-			files, _, err := glob.Glob([]string{filepath.Join(rc.Config.Workdir, path)})
-			if err != nil {
-				logrus.Errorf("Unable to glob.Glob: %v", err)
-				return ""
+		_ = vm.Set("hashFiles", func(paths ...string) string {
+			files := []*glob.FileAsset{}
+			for i := range paths {
+				newFiles, _, err := glob.Glob([]string{filepath.Join(rc.Config.Workdir, paths[i])})
+				if err != nil {
+					logrus.Errorf("Unable to glob.Glob: %v", err)
+					return ""
+				}
+				files = append(files, newFiles...)
 			}
 			hasher := sha256.New()
 			for _, file := range files {
diff --git a/pkg/runner/expression_test.go b/pkg/runner/expression_test.go
index 8c45202..817a8d1 100644
--- a/pkg/runner/expression_test.go
+++ b/pkg/runner/expression_test.go
@@ -83,6 +83,7 @@ func TestEvaluate(t *testing.T) {
 		{"(fromJSON('{\"foo\":\"bar\"}')).foo", "bar", ""},
 		{"(fromJson('{\"foo\":\"bar\"}')).foo", "bar", ""},
 		{"hashFiles('**/non-extant-files')", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", ""},
+		{"hashFiles('**/non-extant-files', '**/more-non-extant-files')", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", ""},
 		{"success()", "true", ""},
 		{"failure()", "false", ""},
 		{"always()", "true", ""},