diff --git a/apps/cnspec/cmd/root.go b/apps/cnspec/cmd/root.go
index 3304bb6a..23c6bbd5 100644
--- a/apps/cnspec/cmd/root.go
+++ b/apps/cnspec/cmd/root.go
@@ -97,7 +97,7 @@ func init() {
 	rootCmd.PersistentFlags().String("api-proxy", "", "Set proxy for communications with Mondoo API")
 	viper.BindPFlag("verbose", rootCmd.PersistentFlags().Lookup("verbose"))
 	viper.BindPFlag("log-level", rootCmd.PersistentFlags().Lookup("log-level"))
-	viper.BindPFlag("api-proxy", rootCmd.PersistentFlags().Lookup("api-proxy"))
+	viper.BindPFlag("api_proxy", rootCmd.PersistentFlags().Lookup("api-proxy"))
 	viper.BindEnv("features")
 
 	config.Init(rootCmd)