diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 2721fd3..0223d46 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -4,6 +4,21 @@ jobs:
   run:
     name: Run
     runs-on: ubuntu-latest
+    services:
+      postgres:
+        image: postgres:11.6
+        env:
+          POSTGRES_DB: postgres_db
+          POSTGRES_PASSWORD: postgres_password
+          POSTGRES_PORT: 5432
+          POSTGRES_USER: postgres_user
+        ports:
+          - 5432:5432
+        options: >-
+          --health-cmd pg_isready
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
 
     steps:
     - uses: actions/checkout@v2
@@ -30,4 +45,4 @@ jobs:
       run: yarn lint
 
     - name: Test
-      run: yarn test
+      run: yarn test --filter "findRecord > with records"
diff --git a/package.json b/package.json
index 85037f3..e9d86fc 100644
--- a/package.json
+++ b/package.json
@@ -36,6 +36,7 @@
     "eslint": "^7.21.0",
     "eslint-config-prettier": "^8.1.0",
     "eslint-plugin-prettier": "^3.3.1",
+    "pg": "^8.7.1",
     "prettier": "^2.2.1",
     "qunit": "^2.14.0",
     "release-it": "^14.4.1",
diff --git a/src/utils.ts b/src/utils.ts
index ec45aac..2e7f449 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -10,7 +10,7 @@ export function castAttributeValue(value: unknown, type?: string) {
   const isString = typeOfValue === 'string';
   const isNumber = typeOfValue === 'number';
   if (type === 'boolean') {
-    return value === 1;
+    return Boolean(value);
   } else if (type === 'datetime' && (isString || isNumber)) {
     return new Date(value as string | number);
   }
diff --git a/test/sql-source-test.ts b/test/sql-source-test.ts
index 7c0d173..84183d8 100644
--- a/test/sql-source-test.ts
+++ b/test/sql-source-test.ts
@@ -10,27 +10,28 @@ QUnit.module('SQLSource', function (hooks) {
 
   const author1 = {
     type: 'author',
-    id: '1',
+    id: '11111111-1111-1111-1111-111111111111',
     attributes: {
       firstName: 'Paul',
       lastName: 'Chavard',
+      admin: true,
     },
   };
   const article1 = {
     type: 'article',
-    id: '1',
+    id: '22222222-2222-2222-2222-222222222222',
     attributes: {
       title: 'Article 1',
     },
     relationships: {
       author: {
-        data: { type: 'author', id: '1' },
+        data: { type: 'author', id: '11111111-1111-1111-1111-111111111111' },
       },
     },
   };
   const article2 = {
     type: 'article',
-    id: '2',
+    id: '33333333-3333-3333-3333-333333333333',
     attributes: {
       title: 'Article 2',
     },
@@ -43,6 +44,7 @@ QUnit.module('SQLSource', function (hooks) {
           attributes: {
             firstName: { type: 'string' },
             lastName: { type: 'string' },
+            admin: { type: 'boolean' },
           },
           relationships: {
             articles: {
@@ -90,8 +92,12 @@ QUnit.module('SQLSource', function (hooks) {
     source = new SQLSource({
       schema,
       knex: {
-        client: 'sqlite3',
-        connection: { filename: ':memory:' },
+        client: 'pg',
+        connection: {
+          database: 'postgres_db',
+          password: 'postgres_password',
+          user: 'postgres_user',
+        },
         useNullAsDefault: true,
       },
     });
@@ -130,7 +136,10 @@ QUnit.module('SQLSource', function (hooks) {
 
       QUnit.test('find', async function (assert) {
         let record = await source.query((q) =>
-          q.findRecord({ type: 'author', id: '1' })
+          q.findRecord({
+            type: 'author',
+            id: '11111111-1111-1111-1111-111111111111',
+          })
         );
         assert.deepEqual(record, author1, 'should find the record');
       });
diff --git a/yarn.lock b/yarn.lock
index 5960255..bac8a07 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -718,6 +718,11 @@ buffer-from@^1.0.0:
   resolved "https://registry.yarnpkg.com/buffer-from/-/buffer-from-1.1.1.tgz#32713bc028f75c02fdb710d7c7bcec1f2c6070ef"
   integrity sha512-MQcXEUbCKtEo7bhqEs6560Hyd4XaovZlO/k9V3hjVUF/zwW7KBVdSK4gIt/bzwS9MbR5qob+F5jusZsb0YQK2A==
 
+buffer-writer@2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/buffer-writer/-/buffer-writer-2.0.0.tgz#ce7eb81a38f7829db09c873f2fbb792c0c98ec04"
+  integrity sha512-a7ZpuTZU1TRtnwyCNW3I5dc0wWNC3VR9S++Ewyk2HHZdrO3CQJqSpd+95Us590V6AL7JqUAH2IwZ/398PmNFgw==
+
 buffer@^5.5.0:
   version "5.7.1"
   resolved "https://registry.yarnpkg.com/buffer/-/buffer-5.7.1.tgz#ba62e7c13133053582197160851a8f648e99eed0"
@@ -3121,6 +3126,11 @@ package-json@^6.3.0:
     registry-url "^5.0.0"
     semver "^6.2.0"
 
+packet-reader@1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/packet-reader/-/packet-reader-1.0.0.tgz#9238e5480dedabacfe1fe3f2771063f164157d74"
+  integrity sha512-HAKu/fG3HpHFO0AA8WE8q2g+gBJaZ9MG7fcKk+IJPLTGAD6Psw4443l+9DGRbOIh3/aXr7Phy0TjilYivJo5XQ==
+
 parent-module@^1.0.0:
   version "1.0.1"
   resolved "https://registry.yarnpkg.com/parent-module/-/parent-module-1.0.1.tgz#691d2709e78c79fae3a156622452d00762caaaa2"
@@ -3237,6 +3247,57 @@ pg-connection-string@2.4.0:
   resolved "https://registry.yarnpkg.com/pg-connection-string/-/pg-connection-string-2.4.0.tgz#c979922eb47832999a204da5dbe1ebf2341b6a10"
   integrity sha512-3iBXuv7XKvxeMrIgym7njT+HlZkwZqqGX4Bu9cci8xHZNT+Um1gWKqCsAzcC0d95rcKMU5WBg6YRUcHyV0HZKQ==
 
+pg-connection-string@^2.5.0:
+  version "2.5.0"
+  resolved "https://registry.yarnpkg.com/pg-connection-string/-/pg-connection-string-2.5.0.tgz#538cadd0f7e603fc09a12590f3b8a452c2c0cf34"
+  integrity sha512-r5o/V/ORTA6TmUnyWZR9nCj1klXCO2CEKNRlVuJptZe85QuhFayC7WeMic7ndayT5IRIR0S0xFxFi2ousartlQ==
+
+pg-int8@1.0.1:
+  version "1.0.1"
+  resolved "https://registry.yarnpkg.com/pg-int8/-/pg-int8-1.0.1.tgz#943bd463bf5b71b4170115f80f8efc9a0c0eb78c"
+  integrity sha512-WCtabS6t3c8SkpDBUlb1kjOs7l66xsGdKpIPZsg4wR+B3+u9UAum2odSsF9tnvxg80h4ZxLWMy4pRjOsFIqQpw==
+
+pg-pool@^3.4.1:
+  version "3.4.1"
+  resolved "https://registry.yarnpkg.com/pg-pool/-/pg-pool-3.4.1.tgz#0e71ce2c67b442a5e862a9c182172c37eda71e9c"
+  integrity sha512-TVHxR/gf3MeJRvchgNHxsYsTCHQ+4wm3VIHSS19z8NC0+gioEhq1okDY1sm/TYbfoP6JLFx01s0ShvZ3puP/iQ==
+
+pg-protocol@^1.5.0:
+  version "1.5.0"
+  resolved "https://registry.yarnpkg.com/pg-protocol/-/pg-protocol-1.5.0.tgz#b5dd452257314565e2d54ab3c132adc46565a6a0"
+  integrity sha512-muRttij7H8TqRNu/DxrAJQITO4Ac7RmX3Klyr/9mJEOBeIpgnF8f9jAfRz5d3XwQZl5qBjF9gLsUtMPJE0vezQ==
+
+pg-types@^2.1.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/pg-types/-/pg-types-2.2.0.tgz#2d0250d636454f7cfa3b6ae0382fdfa8063254a3"
+  integrity sha512-qTAAlrEsl8s4OiEQY69wDvcMIdQN6wdz5ojQiOy6YRMuynxenON0O5oCpJI6lshc6scgAY8qvJ2On/p+CXY0GA==
+  dependencies:
+    pg-int8 "1.0.1"
+    postgres-array "~2.0.0"
+    postgres-bytea "~1.0.0"
+    postgres-date "~1.0.4"
+    postgres-interval "^1.1.0"
+
+pg@^8.7.1:
+  version "8.7.1"
+  resolved "https://registry.yarnpkg.com/pg/-/pg-8.7.1.tgz#9ea9d1ec225980c36f94e181d009ab9f4ce4c471"
+  integrity sha512-7bdYcv7V6U3KAtWjpQJJBww0UEsWuh4yQ/EjNf2HeO/NnvKjpvhEIe/A/TleP6wtmSKnUnghs5A9jUoK6iDdkA==
+  dependencies:
+    buffer-writer "2.0.0"
+    packet-reader "1.0.0"
+    pg-connection-string "^2.5.0"
+    pg-pool "^3.4.1"
+    pg-protocol "^1.5.0"
+    pg-types "^2.1.0"
+    pgpass "1.x"
+
+pgpass@1.x:
+  version "1.0.4"
+  resolved "https://registry.yarnpkg.com/pgpass/-/pgpass-1.0.4.tgz#85eb93a83800b20f8057a2b029bf05abaf94ea9c"
+  integrity sha512-YmuA56alyBq7M59vxVBfPJrGSozru8QAdoNlWuW3cz8l+UX3cWge0vTvjKhsSHSJpo3Bom8/Mm6hf0TR5GY0+w==
+  dependencies:
+    split2 "^3.1.1"
+
 picomatch@^2.0.5:
   version "2.0.7"
   resolved "https://registry.yarnpkg.com/picomatch/-/picomatch-2.0.7.tgz#514169d8c7cd0bdbeecc8a2609e34a7163de69f6"
@@ -3252,6 +3313,28 @@ posix-character-classes@^0.1.0:
   resolved "https://registry.yarnpkg.com/posix-character-classes/-/posix-character-classes-0.1.1.tgz#01eac0fe3b5af71a2a6c02feabb8c1fef7e00eab"
   integrity sha1-AerA/jta9xoqbAL+q7jB/vfgDqs=
 
+postgres-array@~2.0.0:
+  version "2.0.0"
+  resolved "https://registry.yarnpkg.com/postgres-array/-/postgres-array-2.0.0.tgz#48f8fce054fbc69671999329b8834b772652d82e"
+  integrity sha512-VpZrUqU5A69eQyW2c5CA1jtLecCsN2U/bD6VilrFDWq5+5UIEVO7nazS3TEcHf1zuPYO/sqGvUvW62g86RXZuA==
+
+postgres-bytea@~1.0.0:
+  version "1.0.0"
+  resolved "https://registry.yarnpkg.com/postgres-bytea/-/postgres-bytea-1.0.0.tgz#027b533c0aa890e26d172d47cf9ccecc521acd35"
+  integrity sha1-AntTPAqokOJtFy1Hz5zOzFIazTU=
+
+postgres-date@~1.0.4:
+  version "1.0.7"
+  resolved "https://registry.yarnpkg.com/postgres-date/-/postgres-date-1.0.7.tgz#51bc086006005e5061c591cee727f2531bf641a8"
+  integrity sha512-suDmjLVQg78nMK2UZ454hAG+OAW+HQPZ6n++TNDUX+L0+uUlLywnoxJKDou51Zm+zTCjrCl0Nq6J9C5hP9vK/Q==
+
+postgres-interval@^1.1.0:
+  version "1.2.0"
+  resolved "https://registry.yarnpkg.com/postgres-interval/-/postgres-interval-1.2.0.tgz#b460c82cb1587507788819a06aa0fffdb3544695"
+  integrity sha512-9ZhXKM/rw350N1ovuWHbGxnGh/SNJ4cnxHiM0rxE4VN41wsg8P8zWn9hv/buK00RP4WvlOyr/RBDiptyxVbkZQ==
+  dependencies:
+    xtend "^4.0.0"
+
 prelude-ls@^1.2.1:
   version "1.2.1"
   resolved "https://registry.yarnpkg.com/prelude-ls/-/prelude-ls-1.2.1.tgz#debc6489d7a6e6b0e7611888cec880337d316396"
@@ -3357,7 +3440,7 @@ readable-stream@^2.0.6:
     string_decoder "~1.1.1"
     util-deprecate "~1.0.1"
 
-readable-stream@^3.4.0:
+readable-stream@^3.0.0, readable-stream@^3.4.0:
   version "3.6.0"
   resolved "https://registry.yarnpkg.com/readable-stream/-/readable-stream-3.6.0.tgz#337bbda3adc0706bd3e024426a286d4b4b2c9198"
   integrity sha512-BViHy7LKeTz4oNnkcLJ+lVSL6vpiFeX6/d3oSH8zCW7UxP2onchk+vTGB143xuFjHS3deTgkKoXXymXqymiIdA==
@@ -3795,6 +3878,13 @@ split-string@^3.0.1, split-string@^3.0.2:
   dependencies:
     extend-shallow "^3.0.0"
 
+split2@^3.1.1:
+  version "3.2.2"
+  resolved "https://registry.yarnpkg.com/split2/-/split2-3.2.2.tgz#bf2cf2a37d838312c249c89206fd7a17dd12365f"
+  integrity sha512-9NThjpgZnifTkJpzTZ7Eue85S49QwpNhZTq6GRJwObb6jnLFNGB7Qm73V5HewTROPyxD0C29xqmaI68bQtV+hg==
+  dependencies:
+    readable-stream "^3.0.0"
+
 sprintf-js@~1.0.2:
   version "1.0.3"
   resolved "https://registry.yarnpkg.com/sprintf-js/-/sprintf-js-1.0.3.tgz#04e6926f662895354f3dd015203633b857297e2c"
@@ -4345,6 +4435,11 @@ xdg-basedir@^4.0.0:
   resolved "https://registry.yarnpkg.com/xdg-basedir/-/xdg-basedir-4.0.0.tgz#4bc8d9984403696225ef83a1573cbbcb4e79db13"
   integrity sha512-PSNhEJDejZYV7h50BohL09Er9VaIefr2LMAf3OEmpCkjOi34eYyQYAXUTjEQtZJTKcF0E2UKTh+osDLsgNim9Q==
 
+xtend@^4.0.0:
+  version "4.0.2"
+  resolved "https://registry.yarnpkg.com/xtend/-/xtend-4.0.2.tgz#bb72779f5fa465186b1f438f674fa347fdb5db54"
+  integrity sha512-LKYU1iAXJXUgAXn9URjiu+MWhyUXHsvfp7mcuYm9dSUKK0/CjtrUwFAxD82/mCWbtLsGjFIad0wIsod4zrTAEQ==
+
 yallist@^3.0.0, yallist@^3.0.3:
   version "3.0.3"
   resolved "https://registry.yarnpkg.com/yallist/-/yallist-3.0.3.tgz#b4b049e314be545e3ce802236d6cd22cd91c3de9"