diff --git a/cmd/controller/cmd/root.go b/cmd/controller/cmd/root.go
index 2bebc269b..ba05fcb3e 100644
--- a/cmd/controller/cmd/root.go
+++ b/cmd/controller/cmd/root.go
@@ -89,7 +89,7 @@ func init() {
 
 func initConfig(cmd *cobra.Command, _ []string) error {
 	configAccessor = viper.NewAccessor(config.Options{
-		StrictMode:  false,
+		StrictMode:  true,
 		SearchPaths: []string{cfgFile},
 	})
 
diff --git a/cmd/manager/cmd/root.go b/cmd/manager/cmd/root.go
index fc3da4af6..0aa2c2fb0 100644
--- a/cmd/manager/cmd/root.go
+++ b/cmd/manager/cmd/root.go
@@ -118,7 +118,7 @@ func init() {
 
 func initConfig(cmd *cobra.Command, _ []string) error {
 	configAccessor = viper.NewAccessor(config.Options{
-		StrictMode:  false,
+		StrictMode:  true,
 		SearchPaths: []string{cfgFile},
 	})