diff --git a/api/config.go b/api/config.go
index 4c45363..596a7ff 100644
--- a/api/config.go
+++ b/api/config.go
@@ -6,7 +6,7 @@ import (
 
 func parseConfig() error {
 	defaults := map[string]string{
-		"POSTGRES": "postgres://postgres:postgres@0.0.0.0/commento?sslmode=disable",
+		"POSTGRES": "postgres://postgres:postgres@localhost/commento?sslmode=disable",
 
 		"PORT":   "8080",
 		"ORIGIN": "",
diff --git a/api/testing.go b/api/testing.go
index d76b018..881d2a2 100644
--- a/api/testing.go
+++ b/api/testing.go
@@ -65,7 +65,7 @@ func setupTestDatabase() error {
 		// set it manually because we need to use commento_test, not commento, by mistake
 		os.Setenv("POSTGRES", os.Getenv("COMMENTO_POSTGRES"))
 	} else {
-		os.Setenv("POSTGRES", "postgres://postgres:postgres@0.0.0.0/commento_test?sslmode=disable")
+		os.Setenv("POSTGRES", "postgres://postgres:postgres@localhost/commento_test?sslmode=disable")
 	}
 
 	if err := connectDB(); err != nil {