diff --git a/packages/postgresql/postgresql.go b/packages/postgresql/postgresql.go
index 600adc0..6d99dd6 100644
--- a/packages/postgresql/postgresql.go
+++ b/packages/postgresql/postgresql.go
@@ -71,6 +71,69 @@ func Init(ctx context.Context) {
 	if err != nil {
 		panic(err)
 	}
+
+	_, err = dbConn.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS hubs ()
+			id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+			creator_id UUID NOT NULL REFERENCES users(id),
+			created_at TIMESTAMP NOT NULL DEFAULT NOW()
+	`)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = dbConn.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS hub_channel_groups ()
+			hub_id UUID PRIMARY KEY NOT NULL REFERENCES hubs(id) ON DELETE CASCADE,
+			channel_group_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+			name TEXT NOT NULL,
+			rgba BIGINT NOT NULL DEFAULT 0 CHECK (rgba BETWEEN 0 AND 4294967295),
+	`)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = dbConn.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS hub_channels ()
+			hub_id UUID PRIMARY KEY NOT NULL REFERENCES hubs(id) ON DELETE CASCADE,
+			channel_id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
+			name TEXT NOT NULL,
+			parent_group_id UUID REFERENCES hub_channel_groups(id) ON DELETE CASCADE,
+	`)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = dbConn.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS hub_users ()
+			hub_id UUID PRIMARY KEY NOT NULL REFERENCES hubs(id) ON DELETE CASCADE,
+			user_id UUID PRIMARY KEY NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+			name TEXT NOT NULL,
+			rgba BIGINT NOT NULL DEFAULT 0 CHECK (rgba BETWEEN 0 AND 4294967295),
+			created_at TIMESTAMP NOT NULL DEFAULT NOW()
+	`)
+	if err != nil {
+		panic(err)
+	}
+	_, err = dbConn.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS hub_user_roles ()
+			user_id UUID PRIMARY KEY NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+			role_id SMALLINT NOT NULL REFERENCES hub_roles(role_id)
+	`)
+	if err != nil {
+		panic(err)
+	}
+
+	_, err = dbConn.Exec(ctx, `
+		CREATE TABLE IF NOT EXISTS hub_roles ()
+			hub_id UUID PRIMARY KEY NOT NULL REFERENCES hubs(id) ON DELETE CASCADE,
+			role_id SMALLINT NOT NULL DEFAULT 0,
+			name TEXT NOT NULL,
+			rgba BIGINT NOT NULL DEFAULT 0 CHECK (rgba BETWEEN 0 AND 4294967295),
+	`)
+	if err != nil {
+		panic(err)
+	}
 }
 
 func UserSave(ctx context.Context, user *types.User) error {
diff --git a/packages/types/types.go b/packages/types/types.go
index 73ea0be..33e6723 100644
--- a/packages/types/types.go
+++ b/packages/types/types.go
@@ -167,6 +167,18 @@ type Hub struct {
 	Creator        uuid.UUID                        `json:"creator"`
 }
 
+type HubChannelGroup struct {
+	Id    uuid.UUID `json:"id"`
+	Name  string    `json:"name"`
+	Color string    `json:"color"`
+}
+
+type HubChannel struct {
+	Id            uuid.UUID `json:"id"`
+	Name          uuid.UUID `json:"name"`
+	ParentGroupId uuid.UUID `json:"parentGroupId"`
+}
+
 type HubUser struct {
 	Id        uuid.UUID `json:"id"`
 	Username  string    `json:"username"`