diff --git a/pyproject.toml b/pyproject.toml
index c514d8c..d611066 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "stackit-core"
-version = "0.0.1"
+version = "0.0.1a"
 authors = [
   "STACKIT Developer Tools <developer-tools@stackit.cloud>",
 ]
@@ -95,4 +95,4 @@ per-file-ignores = """
     # S105: hardcoded passwords in tests are fine
     # S106: hardcoded passwords in tests are fine
   ./tests/*: S101,S105,S106,
-"""
\ No newline at end of file
+"""