diff --git a/config/dpkg/changelog b/config/dpkg/changelog
index 2faad3fd..6b9ce783 100644
--- a/config/dpkg/changelog
+++ b/config/dpkg/changelog
@@ -1,5 +1,5 @@
-dfvfs (20231208-1) unstable; urgency=low
+dfvfs (20231229-1) unstable; urgency=low
 
   * Auto-generated
 
- -- Log2Timeline maintainers <log2timeline-maintainers@googlegroups.com>  Fri, 08 Dec 2023 06:59:06 +0100
+ -- Log2Timeline maintainers <log2timeline-maintainers@googlegroups.com>  Fri, 29 Dec 2023 05:50:02 +0100
diff --git a/dfvfs/__init__.py b/dfvfs/__init__.py
index 026dae40..65b687c7 100644
--- a/dfvfs/__init__.py
+++ b/dfvfs/__init__.py
@@ -6,4 +6,4 @@
 storage media types and file formats.
 """
 
-__version__ = '20231208'
+__version__ = '20231229'
diff --git a/dfvfs/vfs/tsk_file_entry.py b/dfvfs/vfs/tsk_file_entry.py
index dc6c48be..65183552 100644
--- a/dfvfs/vfs/tsk_file_entry.py
+++ b/dfvfs/vfs/tsk_file_entry.py
@@ -104,7 +104,7 @@ def CopyFromDateTimeString(self, time_string):
           YYYY-MM-DD hh:mm:ss.######[+-]##:##
 
           Where # are numeric digits ranging from 0 to 9 and the seconds
-          fraction can be either 3 or 6 digits. The time of day, seconds
+          fraction can be either 3, 6 or 9 digits. The time of day, seconds
           fraction and time zone offset are optional. The default time zone
           is UTC.
     """
@@ -116,18 +116,20 @@ def CopyFromDateTimeString(self, time_string):
     hours = date_time_values.get('hours', 0)
     minutes = date_time_values.get('minutes', 0)
     seconds = date_time_values.get('seconds', 0)
-    microseconds = date_time_values.get('microseconds', 0)
+    nanoseconds = date_time_values.get('nanoseconds', None)
     time_zone_offset = date_time_values.get('time_zone_offset', 0)
 
     self._timestamp = self._GetNumberOfSecondsFromElements(
         year, month, day_of_month, hours, minutes, seconds)
-    self.fraction_of_second = microseconds
-    self._time_zone_offset = time_zone_offset
 
-    if pytsk3.TSK_VERSION_NUM >= 0x040200ff:
-      self.fraction_of_second *= 1000
+    if nanoseconds is not None:
+      self.fraction_of_second = nanoseconds
     else:
-      self.fraction_of_second *= 10
+      # TODO: kept for backwards compatibility with older dfdatetime versions.
+      self.fraction_of_second = date_time_values.get('microseconds', 0) * 1000
+
+    self._precision = dfdatetime_definitions.PRECISION_1_NANOSECOND
+    self._time_zone_offset = time_zone_offset
 
     self._normalized_timestamp = None
     self.is_local_time = False
@@ -153,7 +155,7 @@ def CopyToDateTimeString(self):
       return (f'{year:04d}-{month:02d}-{day_of_month:02d} '
               f'{hours:02d}:{minutes:02d}:{seconds:02d}')
 
-    if pytsk3.TSK_VERSION_NUM >= 0x040200ff:
+    if self._precision == dfdatetime_definitions.PRECISION_1_NANOSECOND:
       return (f'{year:04d}-{month:02d}-{day_of_month:02d} '
               f'{hours:02d}:{minutes:02d}:{seconds:02d}'
               f'.{self.fraction_of_second:09d}')
diff --git a/setup.cfg b/setup.cfg
index 2fa20da1..5bc528cd 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,6 +1,6 @@
 [metadata]
 name = dfvfs
-version = 20231227
+version = 20231229
 description = Digital Forensics Virtual File System (dfVFS).
 long_description = dfVFS, or Digital Forensics Virtual File System, provides read-only access to file-system objects from various storage media types and file formats. The goal of dfVFS is to provide a generic interface for accessing file-system objects, for which it uses several back-ends that provide the actual implementation of the various storage media types, volume systems and file systems.
 long_description_content_type = text/plain