diff --git a/pyproject.toml b/pyproject.toml
index 7729c53..ef821e0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "CodonTransformer"
-version = "1.6.3"
+version = "1.6.4"
 description = "The ultimate tool for codon optimization, transforming protein sequences into optimized DNA sequences specific for your target organisms."
 authors = ["Adibvafa Fallahpour <Adibvafa.fallahpour@mail.utoronto.ca>"]
 license = "Apache-2.0"
diff --git a/setup.py b/setup.py
index 03f4f4f..2c51966 100644
--- a/setup.py
+++ b/setup.py
@@ -19,7 +19,7 @@ def read_readme():
 
 setup(
     name="CodonTransformer",
-    version="1.6.3",
+    version="1.6.4",
     packages=find_packages(),
     install_requires=read_requirements(),
     author="Adibvafa Fallahpour",