diff --git a/internal/repository/projects.go b/internal/repository/projects.go
index 720322f..d86c816 100644
--- a/internal/repository/projects.go
+++ b/internal/repository/projects.go
@@ -31,14 +31,14 @@ func CreateProject(ctx context.Context, db *sql.DB, data *ProjectData) error {
 		return err
 	}
 	defer tx.Rollback()
-	query := `
+	queryProject := `
 	INSERT INTO projects
 	(uuid, name, slug, description, owner_user_id, billing_account_id, created_by, created_at, updated_by, updated_at)
 	VALUES
 	($1, $2, $3, $4, $5, $6, $7, $8, $9, $10) 
 	`
 
-	if _, err := tx.ExecContext(ctx, query,
+	if _, err := tx.ExecContext(ctx, queryProject,
 		data.UUID, data.Name, data.Slug, data.Description, data.CreatedBy,
 		data.CreatedBy, data.CreatedBy, data.CreatedAt, data.CreatedBy, data.CreatedAt); err != nil {
 		var pgErr *pgconn.PgError
@@ -54,6 +54,28 @@ func CreateProject(ctx context.Context, db *sql.DB, data *ProjectData) error {
 		return err
 	}
 
+	queryMembership := `
+	INSERT INTO project_membership
+	(project_uuid, user_uuid, role, status, invited_by, joined_at)
+	VALUES
+	($1, $2, $3, $4, $5, $6);
+	`
+	if _, err := tx.ExecContext(ctx, queryMembership,
+		data.UUID, data.CreatedBy, "owner", "active", data.CreatedBy, data.CreatedAt,
+	); err != nil {
+		var pgErr *pgconn.PgError
+		if errors.As(err, &pgErr) {
+			switch pgErr.Code {
+			case pgerrcode.UniqueViolation:
+				return ErrAlreadyExists
+			case pgerrcode.CheckViolation:
+				return ErrCheckNotPassed
+			}
+			return err
+		}
+		return err
+	}
+
 	if err := tx.Commit(); err != nil {
 		return err
 	}
diff --git a/migrations/20260518193057_project_membership_init.down.sql b/migrations/20260518193057_project_membership_init.down.sql
index 76e1132..cd338a6 100644
--- a/migrations/20260518193057_project_membership_init.down.sql
+++ b/migrations/20260518193057_project_membership_init.down.sql
@@ -1,7 +1,7 @@
-DROP INDEX IF EXISTS idx_project_memberships_project;
-DROP INDEX IF EXISTS idx_project_memberships_user;
+DROP INDEX IF EXISTS idx_project_membership_project;
+DROP INDEX IF EXISTS idx_project_membership_user;
 
-DROP TABLE IF EXISTS project_memberships;
+DROP TABLE IF EXISTS project_membership;
 
 DROP TYPE IF EXISTS membership_status;
 DROP TYPE IF EXISTS project_role;
diff --git a/migrations/20260518193057_project_membership_init.up.sql b/migrations/20260518193057_project_membership_init.up.sql
index 57b56d9..e56fa39 100644
--- a/migrations/20260518193057_project_membership_init.up.sql
+++ b/migrations/20260518193057_project_membership_init.up.sql
@@ -10,7 +10,7 @@ CREATE TYPE membership_status AS ENUM (
     'suspended'
 );
 
-CREATE TABLE project_memberships (
+CREATE TABLE project_membership (
     project_uuid UUID NOT NULL
         REFERENCES projects(uuid)
         ON DELETE CASCADE,
@@ -28,8 +28,8 @@ CREATE TABLE project_memberships (
     PRIMARY KEY (project_uuid, user_uuid)
 );
 
-CREATE INDEX idx_project_memberships_user 
-ON project_memberships(user_uuid); 
+CREATE INDEX idx_project_membership_user 
+ON project_membership(user_uuid); 
 
-CREATE INDEX idx_project_memberships_project 
-ON project_memberships(project_uuid);
+CREATE INDEX idx_project_membership_project 
+ON project_membership(project_uuid);