diff --git a/decode.ts b/decode.ts
index 05151580..7bd7c7b8 100644
--- a/decode.ts
+++ b/decode.ts
@@ -177,6 +177,10 @@ function decodeByteaEscape(byteaStr: string): Uint8Array {
   return new Uint8Array(bytes);
 }
 
+function decodeByteaArray(value: string): unknown[] {
+  return parseArray(value, decodeBytea);
+}
+
 const decoder = new TextDecoder();
 
 // deno-lint-ignore no-explicit-any
@@ -240,6 +244,8 @@ function decodeText(value: Uint8Array, typeOid: number): any {
       return decodeStringArray(strValue);
     case Oid.bool:
       return strValue[0] === "t";
+    case Oid._bool:
+      return parseArray(strValue, (x) => x[0] === "t");
     case Oid.int2:
     case Oid.int4:
       return decodeBaseTenInt(strValue);
@@ -262,6 +268,8 @@ function decodeText(value: Uint8Array, typeOid: number): any {
       return decodeJsonArray(strValue);
     case Oid.bytea:
       return decodeBytea(strValue);
+    case Oid._bytea:
+      return decodeByteaArray(strValue);
     default:
       throw new Error(`Don't know how to parse column type: ${typeOid}`);
   }
diff --git a/tests/data_types.ts b/tests/data_types.ts
index 83c706c0..f57d88b1 100644
--- a/tests/data_types.ts
+++ b/tests/data_types.ts
@@ -301,3 +301,37 @@ testClient(async function jsonArray() {
     ],
   );
 });
+
+testClient(async function bool() {
+  const result = await CLIENT.query(
+    `SELECT bool('y')`,
+  );
+  assertEquals(result.rows[0][0], true);
+});
+
+testClient(async function _bool() {
+  const result = await CLIENT.query(
+    `SELECT array[bool('y'), bool('n'), bool('1'), bool('0')]`,
+  );
+  assertEquals(result.rows[0][0], [true, false, true, false]);
+});
+
+testClient(async function bytea() {
+  const result = await CLIENT.query(
+    `SELECT decode('MTIzAAE=','base64')`,
+  );
+  assertEquals(result.rows[0][0], new Uint8Array([49, 50, 51, 0, 1]));
+});
+
+testClient(async function _bytea() {
+  const result = await CLIENT.query(
+    `SELECT array[ decode('MTIzAAE=','base64'), decode('MAZzBtf=', 'base64') ]`,
+  );
+  assertEquals(
+    result.rows[0][0],
+    [
+      new Uint8Array([49, 50, 51, 0, 1]),
+      new Uint8Array([48, 6, 115, 6, 215]),
+    ],
+  );
+});