diff --git a/.github/workflows/python-package.yml b/.github/workflows/python-package.yml
index 040e3343..42126836 100644
--- a/.github/workflows/python-package.yml
+++ b/.github/workflows/python-package.yml
@@ -77,7 +77,7 @@ jobs:
 
       - run: |
           mk python-release owner=vkottler \
-                            repo=runtimepy version=5.3.0
+                            repo=runtimepy version=5.3.1
         if: |
           matrix.python-version == '3.12'
           && matrix.system == 'ubuntu-latest'
diff --git a/README.md b/README.md
index 1fabc5fa..f870dec0 100644
--- a/README.md
+++ b/README.md
@@ -2,11 +2,11 @@
     =====================================
     generator=datazen
     version=3.1.4
-    hash=5d2077f589ab71dc3657c502813d4784
+    hash=80ff32f18958cf12959d97ebc77f4c32
     =====================================
 -->
 
-# runtimepy ([5.3.0](https://pypi.org/project/runtimepy/))
+# runtimepy ([5.3.1](https://pypi.org/project/runtimepy/))
 
 [![python](https://img.shields.io/pypi/pyversions/runtimepy.svg)](https://pypi.org/project/runtimepy/)
 ![Build Status](https://github.com/vkottler/runtimepy/workflows/Python%20Package/badge.svg)
diff --git a/local/variables/package.yaml b/local/variables/package.yaml
index 4ee07437..4a0244cc 100644
--- a/local/variables/package.yaml
+++ b/local/variables/package.yaml
@@ -1,5 +1,5 @@
 ---
 major: 5
 minor: 3
-patch: 0
+patch: 1
 entry: runtimepy
diff --git a/pyproject.toml b/pyproject.toml
index f0cd5525..24f701e2 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta:__legacy__"
 
 [project]
 name = "runtimepy"
-version = "5.3.0"
+version = "5.3.1"
 description = "A framework for implementing Python services."
 readme = "README.md"
 requires-python = ">=3.11"
diff --git a/runtimepy/__init__.py b/runtimepy/__init__.py
index 238ad3b5..34ee28fd 100644
--- a/runtimepy/__init__.py
+++ b/runtimepy/__init__.py
@@ -1,7 +1,7 @@
 # =====================================
 # generator=datazen
 # version=3.1.4
-# hash=ec0d70a1963b4f2d02aa421f4d961643
+# hash=231380c332c2ef6a1d5009c0a20aed5c
 # =====================================
 
 """
@@ -10,7 +10,7 @@
 
 DESCRIPTION = "A framework for implementing Python services."
 PKG_NAME = "runtimepy"
-VERSION = "5.3.0"
+VERSION = "5.3.1"
 
 # runtimepy-specific content.
 METRICS_NAME = "metrics"
diff --git a/runtimepy/primitives/serializable/base.py b/runtimepy/primitives/serializable/base.py
index b846f941..839493b5 100644
--- a/runtimepy/primitives/serializable/base.py
+++ b/runtimepy/primitives/serializable/base.py
@@ -105,25 +105,28 @@ def to_stream(self, stream: _BinaryIO) -> int:
         return result
 
     @abstractmethod
-    def update(self, data: bytes) -> int:
+    def update(self, data: bytes, timestamp_ns: int = None) -> int:
         """Update this serializable from a bytes instance."""
 
-    def update_str(self, data: str) -> int:
+    def update_str(self, data: str, timestamp_ns: int = None) -> int:
         """Update this serializable from string data."""
-        return self.update(data.encode(encoding=DEFAULT_ENCODING))
 
-    def _from_stream(self, stream: _BinaryIO) -> int:
+        return self.update(
+            data.encode(encoding=DEFAULT_ENCODING), timestamp_ns=timestamp_ns
+        )
+
+    def _from_stream(self, stream: _BinaryIO, timestamp_ns: int = None) -> int:
         """Update just this instance from a stream."""
 
-        return self.update(stream.read(self.size))
+        return self.update(stream.read(self.size), timestamp_ns=timestamp_ns)
 
-    def from_stream(self, stream: _BinaryIO) -> int:
+    def from_stream(self, stream: _BinaryIO, timestamp_ns: int = None) -> int:
         """Update this serializable from a stream."""
 
-        result = self._from_stream(stream)
+        result = self._from_stream(stream, timestamp_ns=timestamp_ns)
 
         if self.chain is not None:
-            result += self.chain.from_stream(stream)
+            result += self.chain.from_stream(stream, timestamp_ns=timestamp_ns)
 
         return result
 
diff --git a/runtimepy/primitives/serializable/fixed.py b/runtimepy/primitives/serializable/fixed.py
index 7a85d129..6f24f635 100644
--- a/runtimepy/primitives/serializable/fixed.py
+++ b/runtimepy/primitives/serializable/fixed.py
@@ -31,9 +31,11 @@ def __bytes__(self) -> bytes:
         """Get this serializable as a bytes instance."""
         return self.data
 
-    def update(self, data: bytes) -> int:
+    def update(self, data: bytes, timestamp_ns: int = None) -> int:
         """Update this serializable from a bytes instance."""
 
+        del timestamp_ns
+
         self.data = data
         self.size = len(self.data)
         return self.size
diff --git a/runtimepy/primitives/serializable/prefixed.py b/runtimepy/primitives/serializable/prefixed.py
index aec1e297..115204c2 100644
--- a/runtimepy/primitives/serializable/prefixed.py
+++ b/runtimepy/primitives/serializable/prefixed.py
@@ -44,10 +44,10 @@ def __str__(self) -> str:
         """Get this chunk as a string."""
         return str(self.chunk)
 
-    def update(self, data: bytes) -> int:
+    def update(self, data: bytes, timestamp_ns: int = None) -> int:
         """Update this serializable from a bytes instance."""
 
-        size = self.chunk.update(data)
+        size = self.chunk.update(data, timestamp_ns=timestamp_ns)
         self.prefix.value = size
         return self._update_size()
 
@@ -73,13 +73,14 @@ def __bytes__(self) -> bytes:
             self.chunk
         )
 
-    def _from_stream(self, stream: _BinaryIO) -> int:
+    def _from_stream(self, stream: _BinaryIO, timestamp_ns: int = None) -> int:
         """Update just this instance from a stream."""
 
         self.chunk.update(
             stream.read(
                 self.prefix.from_stream(stream, byte_order=self.byte_order)
-            )
+            ),
+            timestamp_ns=timestamp_ns,
         )
         return self._update_size()