diff --git a/microbootstrap/instruments/logging_instrument.py b/microbootstrap/instruments/logging_instrument.py
index f27fe2f..4335e39 100644
--- a/microbootstrap/instruments/logging_instrument.py
+++ b/microbootstrap/instruments/logging_instrument.py
@@ -5,6 +5,7 @@
 import typing
 import urllib.parse
 
+import orjson
 import pydantic
 import structlog
 import typing_extensions
@@ -81,7 +82,7 @@ def tracer_injection(_: WrappedLogger, __: str, event_dict: EventDict) -> EventD
     structlog.processors.format_exc_info,
     structlog.processors.UnicodeDecoder(),
 ]
-DEFAULT_STRUCTLOG_FORMATTER_PROCESSOR: typing.Final = structlog.processors.JSONRenderer()
+DEFAULT_STRUCTLOG_FORMATTER_PROCESSOR: typing.Final = structlog.processors.JSONRenderer(serializer=orjson.dumps)
 
 
 class MemoryLoggerFactory(structlog.stdlib.LoggerFactory):
diff --git a/pyproject.toml b/pyproject.toml
index 57ca5e0..33300f6 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -53,6 +53,7 @@ dependencies = [
     "opentelemetry-instrumentation-psycopg>=0.54b1",
     "opentelemetry-instrumentation-sqlalchemy>=0.54b1",
     "opentelemetry-instrumentation-asyncio>=0.54b1",
+    "orjson>=3.10.18",
 ]
 dynamic = ["version"]
 authors = [{ name = "community-of-python" }]