diff --git a/app/src/main/resources/schema.sql b/app/src/main/resources/schema.sql
index db3a13f..227ae49 100644
--- a/app/src/main/resources/schema.sql
+++ b/app/src/main/resources/schema.sql
@@ -1,18 +1,20 @@
 DROP TABLE IF EXISTS urls CASCADE;
 
 CREATE TABLE urls (
-    id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    id SERIAL,
     name VARCHAR(255) NOT NULL,
-    created_at TIMESTAMP NOT NULL
+    created_at TIMESTAMP NOT NULL,
+    CONSTRAINT pk_urls PRIMARY KEY (id)
 );
 
 DROP TABLE IF EXISTS url_checks;
 CREATE TABLE url_checks (
-    id BIGINT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,
+    id SERIAL,
     url_id BIGINT REFERENCES urls (id) NOT NULL,
     status_code BIGINT,
     h1 VARCHAR(255),
     title VARCHAR(255),
     description TEXT,
-    created_at TIMESTAMP NOT NULL
+    created_at TIMESTAMP NOT NULL,
+    CONSTRAINT pk_url_checks PRIMARY KEY (id)
 )