diff --git a/flow/record/adapter/elastic.py b/flow/record/adapter/elastic.py
index 035199d..86081ea 100644
--- a/flow/record/adapter/elastic.py
+++ b/flow/record/adapter/elastic.py
@@ -54,6 +54,7 @@ def __init__(
         if not uri.lower().startswith(("http://", "https://")):
             uri = "http://" + uri
 
+        self.json_packer = JsonRecordPacker(pack_descriptors=False)
         self.queue: queue.Queue[Record | StopIteration] = queue.Queue()
         self.event = threading.Event()
 
@@ -64,8 +65,6 @@ def __init__(
             api_key=api_key,
         )
 
-        self.json_packer = JsonRecordPacker()
-
         self.thread = threading.Thread(target=self.streaming_bulk_thread)
         self.thread.start()
         self.exception: Exception | None = None
@@ -90,7 +89,7 @@ def excepthook(self, exc: threading.ExceptHookArgs, *args, **kwargs) -> None:
 
     def record_to_document(self, record: Record, index: str) -> dict:
         """Convert a record to a Elasticsearch compatible document dictionary"""
-        rdict = record._asdict()
+        rdict = self.json_packer.pack_obj(record)
 
         # Store record metadata under `_record_metadata`.
         rdict_meta = {
diff --git a/flow/record/jsonpacker.py b/flow/record/jsonpacker.py
index 06264c8..6678893 100644
--- a/flow/record/jsonpacker.py
+++ b/flow/record/jsonpacker.py
@@ -51,6 +51,10 @@ def pack_obj(self, obj):
                 if field_type == "boolean" and isinstance(serial[field_name], int):
                     serial[field_name] = bool(serial[field_name])
 
+                # Flatten command type
+                elif field_type == "command" and isinstance(serial[field_name], fieldtypes.command):
+                    serial[field_name] = serial[field_name]._join()
+
             return serial
         if isinstance(obj, RecordDescriptor):
             serial = {
diff --git a/tests/test_elastic_adapter.py b/tests/test_elastic_adapter.py
index c70012d..d6aaa85 100644
--- a/tests/test_elastic_adapter.py
+++ b/tests/test_elastic_adapter.py
@@ -1,3 +1,5 @@
+from __future__ import annotations
+
 import json
 
 import pytest
@@ -10,18 +12,50 @@
     [
         ("string", "field_one"),
         ("string", "field_two"),
+        ("string", "field_three"),
+    ],
+)
+
+AnotherRecord = RecordDescriptor(
+    "my/record",
+    [
+        ("command", "field_one"),
+        ("boolean", "field_two"),
+        ("bytes", "field_three"),
     ],
 )
 
 
 @pytest.mark.parametrize(
-    "record",
+    "record, expected_output",
     [
-        MyRecord("first", "record"),
-        MyRecord("second", "record"),
+        (
+            MyRecord("first", "record", "!"),
+            {
+                "field_one": "first",
+                "field_two": "record",
+                "field_three": "!",
+            },
+        ),
+        (
+            MyRecord("second", "record", "!"),
+            {
+                "field_one": "second",
+                "field_two": "record",
+                "field_three": "!",
+            },
+        ),
+        (
+            AnotherRecord("/bin/bash -c 'echo hello'", False, b"\x01\x02\x03\x04"),
+            {
+                "field_one": "/bin/bash -c 'echo hello'",
+                "field_two": False,
+                "field_three": "AQIDBA==",
+            },
+        ),
     ],
 )
-def test_elastic_writer_metadata(record):
+def test_elastic_writer_metadata(record: MyRecord | AnotherRecord, expected_output: dict) -> None:
     options = {
         "_meta_foo": "some value",
         "_meta_bar": "another value",
@@ -34,8 +68,7 @@ def test_elastic_writer_metadata(record):
             "_index": "some-index",
             "_source": json.dumps(
                 {
-                    "field_one": record.field_one,
-                    "field_two": record.field_two,
+                    **expected_output,
                     "_record_metadata": {
                         "descriptor": {
                             "name": "my/record",
diff --git a/tests/test_json_packer.py b/tests/test_json_packer.py
index acd2edb..8d0877d 100644
--- a/tests/test_json_packer.py
+++ b/tests/test_json_packer.py
@@ -110,3 +110,19 @@ def test_record_pack_surrogateescape() -> None:
 
     # pack the json string back to a record and make sure it is the same as before
     assert packer.unpack(data) == record
+
+
+def test_record_pack_command_type() -> None:
+    TestRecord = RecordDescriptor(
+        "test/record_with_commands",
+        [
+            ("command", "win_command"),
+            ("command", "nix_command"),
+        ],
+    )
+
+    record = TestRecord(win_command="foo.exe /H /E /L /O", nix_command="/bin/bash -c 'echo hello'")
+    packer = JsonRecordPacker()
+    data = packer.pack(record)
+
+    assert data.startswith('{"win_command": "foo.exe /H /E /L /O", "nix_command": "/bin/bash -c \'echo hello\'", ')