diff --git a/mixed-examples/infa-as-code-cookbook/5671_06/12-Managing automatically external cookbooks/There's more with Puppet/puppetcode/Puppetfile b/mixed-examples/infa-as-code-cookbook/5671_06/12-Managing automatically external cookbooks/There's more with Puppet/puppetcode/Puppetfile
index e232b0fbc..03c8461bc 100644
--- a/mixed-examples/infa-as-code-cookbook/5671_06/12-Managing automatically external cookbooks/There's more with Puppet/puppetcode/Puppetfile	
+++ b/mixed-examples/infa-as-code-cookbook/5671_06/12-Managing automatically external cookbooks/There's more with Puppet/puppetcode/Puppetfile	
@@ -8,4 +8,4 @@ mod 'mariadb', :local =>true
 # Modules discovered by generate-puppetfile
 mod 'puppet/staging', '2.1.0'
 mod 'puppetlabs/mysql', '3.10.0'
-mod 'puppetlabs/stdlib', '4.15.0'
+mod 'puppetlabs/stdlib', '8.4.0'
diff --git a/mixed-examples/infa-as-code-cookbook/5671_07/01-Linting infrastructure code using FoodCritic or Cookstyle/There's more with Puppet/puppetcode/Puppetfile b/mixed-examples/infa-as-code-cookbook/5671_07/01-Linting infrastructure code using FoodCritic or Cookstyle/There's more with Puppet/puppetcode/Puppetfile
index e232b0fbc..03c8461bc 100644
--- a/mixed-examples/infa-as-code-cookbook/5671_07/01-Linting infrastructure code using FoodCritic or Cookstyle/There's more with Puppet/puppetcode/Puppetfile	
+++ b/mixed-examples/infa-as-code-cookbook/5671_07/01-Linting infrastructure code using FoodCritic or Cookstyle/There's more with Puppet/puppetcode/Puppetfile	
@@ -8,4 +8,4 @@ mod 'mariadb', :local =>true
 # Modules discovered by generate-puppetfile
 mod 'puppet/staging', '2.1.0'
 mod 'puppetlabs/mysql', '3.10.0'
-mod 'puppetlabs/stdlib', '4.15.0'
+mod 'puppetlabs/stdlib', '8.4.0'
diff --git a/mixed-examples/infa-as-code-cookbook/5671_07/02-Unit testing infrastructure code using ChefSpec/There's more with Puppet/puppetcode/Puppetfile b/mixed-examples/infa-as-code-cookbook/5671_07/02-Unit testing infrastructure code using ChefSpec/There's more with Puppet/puppetcode/Puppetfile
index e232b0fbc..03c8461bc 100644
--- a/mixed-examples/infa-as-code-cookbook/5671_07/02-Unit testing infrastructure code using ChefSpec/There's more with Puppet/puppetcode/Puppetfile	
+++ b/mixed-examples/infa-as-code-cookbook/5671_07/02-Unit testing infrastructure code using ChefSpec/There's more with Puppet/puppetcode/Puppetfile	
@@ -8,4 +8,4 @@ mod 'mariadb', :local =>true
 # Modules discovered by generate-puppetfile
 mod 'puppet/staging', '2.1.0'
 mod 'puppetlabs/mysql', '3.10.0'
-mod 'puppetlabs/stdlib', '4.15.0'
+mod 'puppetlabs/stdlib', '8.4.0'
diff --git a/mixed-examples/infa-as-code-cookbook/5671_07/03-Testing infrastructure code using Test-Kitchen/There's more with Puppet/puppetcode/Puppetfile b/mixed-examples/infa-as-code-cookbook/5671_07/03-Testing infrastructure code using Test-Kitchen/There's more with Puppet/puppetcode/Puppetfile
index e232b0fbc..03c8461bc 100644
--- a/mixed-examples/infa-as-code-cookbook/5671_07/03-Testing infrastructure code using Test-Kitchen/There's more with Puppet/puppetcode/Puppetfile	
+++ b/mixed-examples/infa-as-code-cookbook/5671_07/03-Testing infrastructure code using Test-Kitchen/There's more with Puppet/puppetcode/Puppetfile	
@@ -8,4 +8,4 @@ mod 'mariadb', :local =>true
 # Modules discovered by generate-puppetfile
 mod 'puppet/staging', '2.1.0'
 mod 'puppetlabs/mysql', '3.10.0'
-mod 'puppetlabs/stdlib', '4.15.0'
+mod 'puppetlabs/stdlib', '8.4.0'
diff --git a/mixed-examples/infa-as-code-cookbook/5671_07/04-Integration testing infrastructure code using ServerSpec/There's more with Puppet/puppetcode/Puppetfile b/mixed-examples/infa-as-code-cookbook/5671_07/04-Integration testing infrastructure code using ServerSpec/There's more with Puppet/puppetcode/Puppetfile
index e232b0fbc..03c8461bc 100644
--- a/mixed-examples/infa-as-code-cookbook/5671_07/04-Integration testing infrastructure code using ServerSpec/There's more with Puppet/puppetcode/Puppetfile	
+++ b/mixed-examples/infa-as-code-cookbook/5671_07/04-Integration testing infrastructure code using ServerSpec/There's more with Puppet/puppetcode/Puppetfile	
@@ -8,4 +8,4 @@ mod 'mariadb', :local =>true
 # Modules discovered by generate-puppetfile
 mod 'puppet/staging', '2.1.0'
 mod 'puppetlabs/mysql', '3.10.0'
-mod 'puppetlabs/stdlib', '4.15.0'
+mod 'puppetlabs/stdlib', '8.4.0'