diff --git a/config.go b/config.go
index e97183c..4e14e7e 100644
--- a/config.go
+++ b/config.go
@@ -13,6 +13,21 @@ type Config struct {
 	Rules                 []BrowserRuleConfig
 }
 
+func (r *BrowserRule) UnmarshalJSON(data []byte) error {
+	var values struct {
+		command         string
+		args            []string
+		matchHostname   []string
+		matchHostRegexp []string
+		matchRegexp     []string
+	}
+	if err := json.Unmarshal(data, &values); err != nil {
+		return err
+	}
+
+	return nil
+}
+
 // BrowserRuleConfig represents a BrowserRule
 type BrowserRuleConfig struct {
 	BrowserCommand []string