diff --git a/charts/generic/pod-cpu-hog/experiment.yaml b/charts/generic/pod-cpu-hog/experiment.yaml
index e8dd9fd..6f83a1b 100644
--- a/charts/generic/pod-cpu-hog/experiment.yaml
+++ b/charts/generic/pod-cpu-hog/experiment.yaml
@@ -78,7 +78,7 @@ spec:
 
     ## It is used in pumba lib only    
     - name: LIB_IMAGE
-      value: 'gaiaadm/pumba'  
+      value: 'litmuschaos/go-runner:ci'  
 
     # provide the socket file path
     # it is used in pumba lib
diff --git a/charts/generic/pod-io-stress/experiment.yaml b/charts/generic/pod-io-stress/experiment.yaml
index b974ef7..e22a484 100644
--- a/charts/generic/pod-io-stress/experiment.yaml
+++ b/charts/generic/pod-io-stress/experiment.yaml
@@ -93,7 +93,7 @@ spec:
 
       # provide lib image
       - name: LIB_IMAGE
-        value: 'gaiaadm/pumba'
+        value: 'litmuschaos/go-runner:ci'
 
       # provide the socket file path
       # it is used in pumba lib
diff --git a/charts/generic/pod-memory-hog/experiment.yaml b/charts/generic/pod-memory-hog/experiment.yaml
index f9ffe13..7b9c84f 100644
--- a/charts/generic/pod-memory-hog/experiment.yaml
+++ b/charts/generic/pod-memory-hog/experiment.yaml
@@ -78,7 +78,7 @@ spec:
 
       ## It is used in pumba lib only    
       - name: LIB_IMAGE
-        value: 'gaiaadm/pumba'
+        value: 'litmuschaos/go-runner:ci'
 
       # provide the socket file path
       # it is used in pumba lib
diff --git a/charts/kube-aws/ec2-terminate/engine.yaml b/charts/kube-aws/ec2-terminate/engine.yaml
index f671cdb..425b6c6 100644
--- a/charts/kube-aws/ec2-terminate/engine.yaml
+++ b/charts/kube-aws/ec2-terminate/engine.yaml
@@ -19,7 +19,8 @@ spec:
             - name: TOTAL_CHAOS_DURATION
               value: '60'
 
-            # Instance ID of the target ec2 instance 
+             # Instance ID of the target ec2 instance
+             # If not provided it will select randomly from the region
             - name: EC2_INSTANCE_ID
               value: ''