diff --git a/libs/micropython/jwt.py b/libs/micropython/jwt.py
index 7ec1172..a6a4851 100644
--- a/libs/micropython/jwt.py
+++ b/libs/micropython/jwt.py
@@ -1,9 +1,13 @@
 import binascii
 import hashlib
 import hmac
-import json
 from time import time
 
+try:
+    import orjson as json
+except ImportError:
+    import json
+
 def _to_b64url(data):
     return (
         binascii.b2a_base64(data)
diff --git a/src/microdot/microdot.py b/src/microdot/microdot.py
index ae8c4ed..102b04f 100644
--- a/src/microdot/microdot.py
+++ b/src/microdot/microdot.py
@@ -7,10 +7,14 @@ servers for MicroPython and standard Python.
 """
 import asyncio
 import io
-import json
 import re
 import time
 
+try:
+    import orjson as json
+except ImportError:
+    import json
+
 try:
     from inspect import iscoroutinefunction, iscoroutine
     from functools import partial
diff --git a/src/microdot/sse.py b/src/microdot/sse.py
index 01143c8..fdfa73e 100644
--- a/src/microdot/sse.py
+++ b/src/microdot/sse.py
@@ -1,7 +1,11 @@
 import asyncio
-import json
 from microdot.helpers import wraps
 
+try:
+    import orjson as json
+except ImportError:
+    import json
+
 
 class SSE:
     """Server-Sent Events object.
diff --git a/src/microdot/test_client.py b/src/microdot/test_client.py
index ec4109f..c08ae59 100644
--- a/src/microdot/test_client.py
+++ b/src/microdot/test_client.py
@@ -1,4 +1,3 @@
-import json
 from microdot.microdot import Request, Response, AsyncBytesIO
 
 try:
@@ -6,6 +5,11 @@ try:
 except:  # pragma: no cover  # noqa: E722
     WebSocket = None
 
+try:
+    import orjson as json
+except ImportError:
+    import json
+
 __all__ = ['TestClient', 'TestResponse']