diff --git a/basic/main.go b/basic/main.go
index ce15b8e..99072ca 100644
--- a/basic/main.go
+++ b/basic/main.go
@@ -23,6 +23,8 @@ func (r *Relay) Storage() relayer.Storage {
 	return &postgresql.PostgresBackend{DatabaseURL: r.PostgresDatabase}
 }
 
+func (r *Relay) OnInitialized() {}
+
 func (r *Relay) Init() error {
 	err := envconfig.Process("", r)
 	if err != nil {
diff --git a/rss-bridge/main.go b/rss-bridge/main.go
index 5d2cc9b..ebad49f 100644
--- a/rss-bridge/main.go
+++ b/rss-bridge/main.go
@@ -29,6 +29,8 @@ func (relay *Relay) Name() string {
 	return "relayer-rss-bridge"
 }
 
+func (r *Relay) OnInitialized() {}
+
 func (relay *Relay) Init() error {
 	err := envconfig.Process("", relay)
 	if err != nil {
diff --git a/storage/postgresql/init.go b/storage/postgresql/init.go
index 30d4e80..03432d3 100644
--- a/storage/postgresql/init.go
+++ b/storage/postgresql/init.go
@@ -4,6 +4,7 @@ import (
 	"github.com/fiatjaf/relayer"
 	"github.com/jmoiron/sqlx"
 	"github.com/jmoiron/sqlx/reflectx"
+	_ "github.com/lib/pq"
 )
 
 func (b *PostgresBackend) Init() error {
diff --git a/whitelisted/main.go b/whitelisted/main.go
index e21a5b0..6ec4660 100644
--- a/whitelisted/main.go
+++ b/whitelisted/main.go
@@ -19,6 +19,8 @@ func (r *Relay) Name() string {
 	return "WhitelistedRelay"
 }
 
+func (r *Relay) OnInitialized() {}
+
 func (r *Relay) Storage() relayer.Storage {
 	return &postgresql.PostgresBackend{DatabaseURL: r.PostgresDatabase}
 }