diff --git a/pkg/runner/expression.go b/pkg/runner/expression.go
index e7b533b..af4a2d1 100644
--- a/pkg/runner/expression.go
+++ b/pkg/runner/expression.go
@@ -166,14 +166,16 @@ func vmJoin(vm *otto.Otto) {
 }
 
 func vmToJSON(vm *otto.Otto) {
-	_ = vm.Set("toJSON", func(o interface{}) string {
+	toJSON := func(o interface{}) string {
 		rtn, err := json.MarshalIndent(o, "", "  ")
 		if err != nil {
 			logrus.Errorf("Unable to marsal: %v", err)
 			return ""
 		}
 		return string(rtn)
-	})
+	}
+	_ = vm.Set("toJSON", toJSON)
+	_ = vm.Set("toJson", toJSON)
 }
 
 func (rc *RunContext) vmHashFiles() func(*otto.Otto) {
diff --git a/pkg/runner/expression_test.go b/pkg/runner/expression_test.go
index 70f608f..6c01fe8 100644
--- a/pkg/runner/expression_test.go
+++ b/pkg/runner/expression_test.go
@@ -64,6 +64,7 @@ func TestEvaluate(t *testing.T) {
 		{"join(['hello','mona','the'],'octocat')", "hello mona the octocat", ""},
 		{"join('hello','mona')", "hello mona", ""},
 		{"toJSON({'foo':'bar'})", "{\n  \"foo\": \"bar\"\n}", ""},
+		{"toJson({'foo':'bar'})", "{\n  \"foo\": \"bar\"\n}", ""},
 		{"hashFiles('**/package-lock.json')", "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", ""},
 		{"success()", "true", ""},
 		{"failure()", "false", ""},