diff --git a/validations/library/network_environment.py b/validations/library/network_environment.py
index 5c826d0eb..1d1bc75e6 100644
--- a/validations/library/network_environment.py
+++ b/validations/library/network_environment.py
@@ -72,7 +72,7 @@ def open_network_environment_files(netenv_path, template_files):
     errors = []
 
     try:
-        network_data = yaml.load(template_files[netenv_path])
+        network_data = yaml.safe_load(template_files[netenv_path])
     except Exception as e:
         return ({}, {}, ["Can't open network environment file '{}': {}"
                          .format(netenv_path, e)])
@@ -85,7 +85,7 @@ def open_network_environment_files(netenv_path, template_files):
             try:
                 nic_configs.append((
                     nic_name, nic_config_path,
-                    yaml.load(template_files[nic_config_path])))
+                    yaml.safe_load(template_files[nic_config_path])))
             except Exception as e:
                 errors.append(
                     "Can't open the resource '{}' reference file '{}': {}"
@@ -471,8 +471,8 @@ def duplicate_static_ips(static_ips):
 
 def validate_node_pool_size(plan_env_path, ip_pools_path, template_files):
     warnings = []
-    plan_env = yaml.load(template_files[plan_env_path])
-    ip_pools = yaml.load(template_files[ip_pools_path])
+    plan_env = yaml.safe_load(template_files[plan_env_path])
+    ip_pools = yaml.safe_load(template_files[ip_pools_path])
 
     param_defaults = plan_env.get('parameter_defaults')
     node_counts = {
diff --git a/validations/library/switch_vlans.py b/validations/library/switch_vlans.py
index 6aeeccc79..9018c5dcd 100644
--- a/validations/library/switch_vlans.py
+++ b/validations/library/switch_vlans.py
@@ -142,7 +142,7 @@ def vlan_exists_on_switch(vlan_id, introspection_data):
     for node, content in introspection_data.items():
         node_valid_lldp = False
         try:
-            data = yaml.load(content)
+            data = yaml.safe_load(content)
         except Exception as e:
             return ["Can't open introspection data : {}" .format(e)], False