diff --git a/spec/configuration/network_spec.rb b/spec/configuration/network_spec.rb
index a31a9dc..3f3f312 100644
--- a/spec/configuration/network_spec.rb
+++ b/spec/configuration/network_spec.rb
@@ -22,7 +22,12 @@
 
 describe 'Management network' do
   it 'The Management network should contain an IP' do
-    expect(ip).to match(/\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}/)
+    expect(ip).to match(
+      /\A(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.
+         (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.
+         (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.
+         (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\z/x
+    )
   end
 end
 
@@ -30,7 +35,13 @@
 describe 'Sync network' do
   sync = command('ip addr show').stdout
   it 'Have a network sync' do
-    interfaces_with_ip = sync.scan(/inet\s+(\d+\.\d+\.\d+\.\d+)/).flatten
+    interfaces_with_ip = sync.scan(
+      /inet\s+
+      (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.
+      (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.
+      (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.
+      (?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)/x
+    ).flatten
     expect(interfaces_with_ip.length).to be >= 3
     puts "OUTPUT: #{interfaces_with_ip}"
   end