diff --git a/README.md b/README.md
index e1011c9..df881a0 100644
--- a/README.md
+++ b/README.md
@@ -131,3 +131,6 @@ Python 3.11 or higher
 
 ## 0.0.18
 - Fixed error for mid level update when not using all channels
+
+## 0.0.19
+- Fixed error in ByteBuilder when printing object
diff --git a/pyproject.toml b/pyproject.toml
index 019fcd2..77be0da 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "science_mode_4"
-version = "0.0.18"
+version = "0.0.19"
 authors = [
   { name="Marc Hofmann", email="marc-hofmann@gmx.de" },
 ]
diff --git a/src/science_mode_4/utils/byte_builder.py b/src/science_mode_4/utils/byte_builder.py
index 2d7f906..dbb0fa7 100644
--- a/src/science_mode_4/utils/byte_builder.py
+++ b/src/science_mode_4/utils/byte_builder.py
@@ -1,5 +1,5 @@
 """Provides a ByteBuilder class for easier creation of a byte stream"""
-
+from typing import Self
 from .bit_vector import BitVector
 
 
@@ -45,7 +45,7 @@ def append_bytes(self, value: bytes):
             self._append_byte(x)
 
 
-    def extend_byte_builder(self, value: "ByteBuilder"):
+    def extend_byte_builder(self, value: Self):
         """Extends current data with value"""
         self._data.extend(value.get_bytes())
 
@@ -93,12 +93,12 @@ def __len__(self) -> int:
 
     def __repr__(self) -> str:
         b = self.get_bytes()
-        return f"length: {len(b)}, bytes: {b.hex(" ").upper()}"
+        return f"length: {len(b)}, bytes: {b.hex(' ').upper()}"
 
 
     def __str__(self) -> str:
         b = self.get_bytes()
-        return f"length: {len(b)}, bytes: {b.hex(" ").upper()}"
+        return f"length: {len(b)}, bytes: {b.hex(' ').upper()}"
 
 
     def _append_byte(self, value: int):