diff --git a/lib/facter/docker.rb b/lib/facter/docker.rb
index 368c12e6..bfa11320 100644
--- a/lib/facter/docker.rb
+++ b/lib/facter/docker.rb
@@ -38,7 +38,7 @@
                  end
 
 def interfaces
-  Facter.value(:interfaces).split(',')
+  Facter.value('networking.interfaces').keys
 end
 
 Facter.add(:docker_version) do
diff --git a/spec/unit/lib/facter/docker_spec.rb b/spec/unit/lib/facter/docker_spec.rb
index e908add5..05d99477 100644
--- a/spec/unit/lib/facter/docker_spec.rb
+++ b/spec/unit/lib/facter/docker_spec.rb
@@ -50,7 +50,12 @@
 
   describe 'docker fact with composer network' do
     before :each do
-      allow(Facter.fact(:interfaces)).to receive(:value).and_return('br-c5810f1e3113,docker0,eth0,lo')
+      allow(Facter.fact('networking.interfaces')).to receive(:value).and_return({
+        'br-c5810f1e3113' => {},
+        'docker0' => {},
+        'eth0' => {},
+        'lo' => {},
+      })
     end
 
     it do