diff --git a/ansible/vars.yaml b/ansible/vars.yaml
index 3589d6f..8de66d2 100644
--- a/ansible/vars.yaml
+++ b/ansible/vars.yaml
@@ -1,2 +1,3 @@
 ---
-ssh_public_key: ""
+# Uncomment and replace null with your SSH public key
+# ssh_public_key: null
diff --git a/heat/environment.yaml b/heat/environment.yaml
index b264dbf..b18c3b1 100644
--- a/heat/environment.yaml
+++ b/heat/environment.yaml
@@ -1,3 +1,4 @@
 ---
 parameters:
-  ssh_public_key: ""
+  # Replace null with your SSH public key
+  ssh_public_key: null
diff --git a/tf/vars.tfvars b/tf/vars.tfvars
index fbda27f..5b4744e 100644
--- a/tf/vars.tfvars
+++ b/tf/vars.tfvars
@@ -1 +1,2 @@
-ssh_public_key = ""
+# Uncomment and replace "" with your SSH public key
+# ssh_public_key = ""