diff --git a/src/package-lock.json b/src/package-lock.json
index faa0411b..29202c8e 100644
--- a/src/package-lock.json
+++ b/src/package-lock.json
@@ -6652,7 +6652,7 @@
     },
     "packages/dumbo": {
       "name": "@event-driven-io/dumbo",
-      "version": "0.4.1",
+      "version": "0.5.0",
       "devDependencies": {
         "@types/node": "20.11.30"
       },
@@ -6669,7 +6669,7 @@
     },
     "packages/pongo": {
       "name": "@event-driven-io/pongo",
-      "version": "0.7.0",
+      "version": "0.8.0",
       "dependencies": {
         "@types/pg-connection-string": "^2.0.0",
         "pg-connection-string": "^2.6.4"
@@ -6678,7 +6678,7 @@
         "@types/node": "20.11.30"
       },
       "peerDependencies": {
-        "@event-driven-io/dumbo": "^0.4.1",
+        "@event-driven-io/dumbo": "^0.5.0",
         "@types/mongodb": "^4.0.7",
         "@types/pg": "^8.11.6",
         "@types/pg-format": "^1.0.5",
diff --git a/src/packages/dumbo/package.json b/src/packages/dumbo/package.json
index 551313ed..be0a5956 100644
--- a/src/packages/dumbo/package.json
+++ b/src/packages/dumbo/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@event-driven-io/dumbo",
-  "version": "0.4.1",
+  "version": "0.5.0",
   "description": "Dumbo - tools for dealing with PostgreSQL",
   "type": "module",
   "scripts": {
diff --git a/src/packages/dumbo/src/execute/connections.e2e.spec.ts b/src/packages/dumbo/src/execute/connections.e2e.spec.ts
new file mode 100644
index 00000000..25968ee8
--- /dev/null
+++ b/src/packages/dumbo/src/execute/connections.e2e.spec.ts
@@ -0,0 +1,59 @@
+import {
+  PostgreSqlContainer,
+  type StartedPostgreSqlContainer,
+} from '@testcontainers/postgresql';
+import { after, before, describe, it } from 'node:test';
+import pg from 'pg';
+import { executeSQL } from '.';
+import { rawSql } from '../sql';
+
+void describe('PostgreSQL connection', () => {
+  let postgres: StartedPostgreSqlContainer;
+  let connectionString: string;
+
+  before(async () => {
+    postgres = await new PostgreSqlContainer().start();
+    connectionString = postgres.getConnectionUri();
+  });
+
+  after(async () => {
+    await postgres.stop();
+  });
+
+  void describe('executeSQL', () => {
+    void it('connects using pool', async () => {
+      const pool = new pg.Pool({ connectionString });
+
+      try {
+        await executeSQL(pool, rawSql('SELECT 1'));
+      } catch (error) {
+        console.log(error);
+      } finally {
+        await pool.end();
+      }
+    });
+
+    void it('connects using connected pool client', async () => {
+      const pool = new pg.Pool({ connectionString });
+      const poolClient = await pool.connect();
+
+      try {
+        await executeSQL(poolClient, rawSql('SELECT 1'));
+      } finally {
+        poolClient.release();
+        await pool.end();
+      }
+    });
+
+    void it('connects using connected client', async () => {
+      const client = new pg.Client({ connectionString });
+      await client.connect();
+
+      try {
+        await executeSQL(client, rawSql('SELECT 1'));
+      } finally {
+        await client.end();
+      }
+    });
+  });
+});
diff --git a/src/packages/dumbo/src/execute/index.ts b/src/packages/dumbo/src/execute/index.ts
index f4cf2804..3721868e 100644
--- a/src/packages/dumbo/src/execute/index.ts
+++ b/src/packages/dumbo/src/execute/index.ts
@@ -1,25 +1,44 @@
-import type pg from 'pg';
+import pg from 'pg';
 import type { SQL } from '../sql';
 
+export const isPgPool = (
+  poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
+): poolOrClient is pg.Pool => {
+  return poolOrClient instanceof pg.Pool;
+};
+
+export const isPgClient = (
+  poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
+): poolOrClient is pg.Client => poolOrClient instanceof pg.Client;
+
+export const isPgPoolClient = (
+  poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
+): poolOrClient is pg.PoolClient =>
+  'release' in poolOrClient && typeof poolOrClient.release === 'function';
+
 export const execute = async <Result = void>(
-  pool: pg.Pool,
-  handle: (client: pg.PoolClient) => Promise<Result>,
+  poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
+  handle: (client: pg.PoolClient | pg.Client) => Promise<Result>,
 ) => {
-  const client = await pool.connect();
+  const client = isPgPool(poolOrClient)
+    ? await poolOrClient.connect()
+    : poolOrClient;
+
   try {
     return await handle(client);
   } finally {
-    client.release();
+    // release only if client wasn't injected externally
+    if (isPgPool(poolOrClient) && isPgPoolClient(client)) client.release();
   }
 };
 
 export const executeInTransaction = async <Result = void>(
-  pool: pg.Pool,
+  poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
   handle: (
-    client: pg.PoolClient,
+    client: pg.PoolClient | pg.Client,
   ) => Promise<{ success: boolean; result: Result }>,
 ): Promise<Result> =>
-  execute(pool, async (client) => {
+  execute(poolOrClient, async (client) => {
     try {
       await client.query('BEGIN');
 
@@ -38,17 +57,15 @@ export const executeInTransaction = async <Result = void>(
 export const executeSQL = async <
   Result extends pg.QueryResultRow = pg.QueryResultRow,
 >(
-  poolOrClient: pg.Pool | pg.PoolClient,
+  poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
   sql: SQL,
 ): Promise<pg.QueryResult<Result>> =>
-  'totalCount' in poolOrClient
-    ? execute(poolOrClient, (client) => client.query<Result>(sql))
-    : poolOrClient.query<Result>(sql);
+  execute(poolOrClient, (client) => client.query<Result>(sql));
 
 export const executeSQLInTransaction = async <
   Result extends pg.QueryResultRow = pg.QueryResultRow,
 >(
-  pool: pg.Pool,
+  pool: pg.Pool | pg.PoolClient | pg.Client,
   sql: SQL,
 ) => {
   console.log(sql);
@@ -61,7 +78,7 @@ export const executeSQLInTransaction = async <
 export const executeSQLBatchInTransaction = async <
   Result extends pg.QueryResultRow = pg.QueryResultRow,
 >(
-  pool: pg.Pool,
+  pool: pg.Pool | pg.PoolClient | pg.Client,
   ...sqls: SQL[]
 ) =>
   executeInTransaction(pool, async (client) => {
diff --git a/src/packages/pongo/package.json b/src/packages/pongo/package.json
index 147302c1..16372950 100644
--- a/src/packages/pongo/package.json
+++ b/src/packages/pongo/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@event-driven-io/pongo",
-  "version": "0.7.0",
+  "version": "0.8.0",
   "description": "Pongo - Mongo with strong consistency on top of Postgres",
   "type": "module",
   "scripts": {
@@ -47,7 +47,7 @@
     "dist"
   ],
   "peerDependencies": {
-    "@event-driven-io/dumbo": "^0.4.1",
+    "@event-driven-io/dumbo": "^0.5.0",
     "@types/mongodb": "^4.0.7",
     "@types/pg": "^8.11.6",
     "@types/pg-format": "^1.0.5",
diff --git a/src/packages/pongo/src/main/pongoClient.connections.e2e.spec.ts b/src/packages/pongo/src/main/pongoClient.connections.e2e.spec.ts
new file mode 100644
index 00000000..95f17e5e
--- /dev/null
+++ b/src/packages/pongo/src/main/pongoClient.connections.e2e.spec.ts
@@ -0,0 +1,85 @@
+import { isPgPool } from '@event-driven-io/dumbo';
+import {
+  PostgreSqlContainer,
+  type StartedPostgreSqlContainer,
+} from '@testcontainers/postgresql';
+import { randomUUID } from 'node:crypto';
+import { after, before, describe, it } from 'node:test';
+import pg from 'pg';
+import { pongoClient } from './pongoClient';
+
+type User = {
+  _id?: string;
+  name: string;
+};
+
+void describe('Pongo collection', () => {
+  let postgres: StartedPostgreSqlContainer;
+  let connectionString: string;
+
+  before(async () => {
+    postgres = await new PostgreSqlContainer().start();
+    connectionString = postgres.getConnectionUri();
+  });
+
+  after(async () => {
+    await postgres.stop();
+  });
+
+  const insertDocumentUsingPongo = async (
+    poolOrClient: pg.Pool | pg.PoolClient | pg.Client,
+  ) => {
+    const pongo = pongoClient(
+      connectionString,
+      isPgPool(poolOrClient)
+        ? undefined
+        : {
+            client: poolOrClient,
+          },
+    );
+
+    try {
+      const pongoCollection = pongo.db().collection<User>('connections');
+      await pongoCollection.insertOne({ name: randomUUID() });
+    } finally {
+      await pongo.close();
+    }
+  };
+
+  void describe('Pool', () => {
+    void it('connects using pool', async () => {
+      const pool = new pg.Pool({ connectionString });
+
+      try {
+        await insertDocumentUsingPongo(pool);
+      } catch (error) {
+        console.log(error);
+      } finally {
+        await pool.end();
+      }
+    });
+
+    void it('connects using connected pool client', async () => {
+      const pool = new pg.Pool({ connectionString });
+      const poolClient = await pool.connect();
+
+      try {
+        await insertDocumentUsingPongo(poolClient);
+      } finally {
+        poolClient.release();
+        await pool.end();
+      }
+    });
+
+    void it('connects using connected client', async () => {
+      const client = new pg.Client({ connectionString });
+      await client.connect();
+
+      try {
+        await insertDocumentUsingPongo(client);
+      } finally {
+        await client.end();
+      }
+    });
+  });
+});
diff --git a/src/packages/pongo/src/main/pongoClient.ts b/src/packages/pongo/src/main/pongoClient.ts
index ee32d0e9..6fab983b 100644
--- a/src/packages/pongo/src/main/pongoClient.ts
+++ b/src/packages/pongo/src/main/pongoClient.ts
@@ -5,7 +5,7 @@ import type { PongoClient, PongoDb } from './typing/operations';
 
 export const pongoClient = (
   connectionString: string,
-  options: { client?: pg.PoolClient } = {},
+  options: { client?: pg.PoolClient | pg.Client } = {},
 ): PongoClient => {
   const defaultDbName = getDatabaseNameOrDefault(connectionString);
   const dbClients: Map<string, DbClient> = new Map();
diff --git a/src/packages/pongo/src/mongo/mongoClient.ts b/src/packages/pongo/src/mongo/mongoClient.ts
index 2f512976..28049b69 100644
--- a/src/packages/pongo/src/mongo/mongoClient.ts
+++ b/src/packages/pongo/src/mongo/mongoClient.ts
@@ -8,7 +8,7 @@ export class MongoClient {
 
   constructor(
     connectionString: string,
-    options: { client?: pg.PoolClient } = {},
+    options: { client?: pg.PoolClient | pg.Client } = {},
   ) {
     this.pongoClient = pongoClient(connectionString, options);
   }
diff --git a/src/packages/pongo/src/postgres/client.ts b/src/packages/pongo/src/postgres/client.ts
index 88e22292..bcd40a36 100644
--- a/src/packages/pongo/src/postgres/client.ts
+++ b/src/packages/pongo/src/postgres/client.ts
@@ -10,7 +10,7 @@ import { postgresCollection } from './postgresCollection';
 export type PongoClientOptions = {
   connectionString: string;
   dbName?: string | undefined;
-  client?: pg.PoolClient | undefined;
+  client?: pg.PoolClient | pg.Client | undefined;
 };
 
 export const postgresClient = (options: PongoClientOptions): DbClient => {
diff --git a/src/packages/pongo/src/postgres/postgresCollection.ts b/src/packages/pongo/src/postgres/postgresCollection.ts
index 17cc5255..4ea0a94e 100644
--- a/src/packages/pongo/src/postgres/postgresCollection.ts
+++ b/src/packages/pongo/src/postgres/postgresCollection.ts
@@ -23,7 +23,7 @@ export const postgresCollection = <T extends PongoDocument>(
   {
     dbName,
     poolOrClient: clientOrPool,
-  }: { dbName: string; poolOrClient: pg.Pool | pg.PoolClient },
+  }: { dbName: string; poolOrClient: pg.Pool | pg.PoolClient | pg.Client },
 ): PongoCollection<T> => {
   const execute = <T extends pg.QueryResultRow = pg.QueryResultRow>(sql: SQL) =>
     executeSQL<T>(clientOrPool, sql);