diff --git a/README.md b/README.md
index 9914b86..96590a4 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ The following parameters can be used as `step.with` keys:
 
 | Name               | Type   | Default | Required |Description                       |
 | ------------------ | ------ | ------- |--------- |--------------------------------- |
-| `versions      `   | String |         | yes      | Json Formatted List as a String  |
+| `versions      `   | String |         | yes      | comma separated list of versions |
 
 
 ## Example usage
@@ -23,5 +23,5 @@ jobs:
     - name: Generate docker build matrix
       uses: ednz-cloud/docker-matrix-generator@v1
       with:
-        versions: '["2.2.8","2.2.7","2.2.4","2.2.3","2.1.5","2.1.4","2.1.3","2.1.2","2.1.1","2.1.0","2.0.20","2.0.19","2.0.18","2.0.17","2.0.16","2.0.15","2.0.14","2.0.13"]'
+        versions: 2.2.8, 2.2.7, 2.2.4, 2.2.3
 ```
\ No newline at end of file
diff --git a/action/matrix_generator.py b/action/matrix_generator.py
index a34b2a3..6d678b6 100644
--- a/action/matrix_generator.py
+++ b/action/matrix_generator.py
@@ -48,10 +48,11 @@ def get_latest_versions(versions: List[str]) -> List[Dict[str, any]]:
 
 def main():
     all_versions_str = os.environ.get("VERSION_LIST", "")
-    print(all_versions_str)
-    all_versions = json.loads(all_versions_str)
+    all_versions_list = [
+        version.strip() for version in all_versions_str.split(",") if version.strip()
+    ]
 
-    version_objects = get_latest_versions(all_versions)
+    version_objects = get_latest_versions(all_versions_list)
 
     value = json.dumps(version_objects)