diff --git a/pyproject.toml b/pyproject.toml
index 8a8e2c0..660f4f9 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "pmotools"
-version = "v1.2.0"
+version = "v1.2.1"
 description = "Tools for building and analyzing PMO files"
 readme = "README.md"
 authors = [
diff --git a/uv.lock b/uv.lock
index b41df83..96b1ced 100644
--- a/uv.lock
+++ b/uv.lock
@@ -285,7 +285,7 @@ wheels = [
 
 [[package]]
 name = "pmotools"
-version = "1.2.0"
+version = "1.2.1"
 source = { editable = "." }
 dependencies = [
     { name = "biopython" },