diff --git a/.fixtures.yml b/.fixtures.yml
index 3a5e2cf..7319fa3 100644
--- a/.fixtures.yml
+++ b/.fixtures.yml
@@ -1,10 +1,10 @@
 fixtures:
   forge_modules:
     stdlib:
       repo: 'puppetlabs/stdlib'
-      ref: '4.6.0'
+      ref: '4.12.0'
     concat:
       repo: 'puppetlabs/concat'
-      ref: '1.2.0'
+      ref: '2.1.0'
   symlinks:
     debnet: "#{source_dir}"