diff --git a/.gitignore b/.gitignore
index cce4326..80f4cb7 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,13 +8,14 @@ __pycache__/
 
 # Distribution / packaging
 .Python
+venv/
+.venv/
 
 .DS_Store
 
 # Specific
 config_environment.txt
 customer-samples/
-venv/
 generated-lambda/
 pluskube-samples/
 sandbox-samples/
diff --git a/lambda_function.py b/lambda_function.py
index cdfb7d1..a521eb4 100644
--- a/lambda_function.py
+++ b/lambda_function.py
@@ -88,6 +88,9 @@ def lambda_handler(event, context):
 
 # Template for pod information
 def sysPodTemplate(pod_name, container_name, pull_string, is_exposed):
+    if pull_string is None or len(pull_string) < 2:
+        pull_string = "unknown"
+
     return {
         "name": pod_name,
         "ips": [],
diff --git a/readme.MD b/readme.MD
index baf5412..fee2cab 100644
--- a/readme.MD
+++ b/readme.MD
@@ -58,4 +58,4 @@ Please note that it is limited to Kubernetes deployments for now.
 
 1. Set env vars (read above).
 
-2. python-lambda-local -t 15 -f lambda_handler lambda_function.py <desired-params>
+2. python-lambda-local -t 15 -f lambda_handler lambda_function.py event.json