diff --git a/CHANGELOG.mkd b/CHANGELOG.mkd
index 0e459d2fd..27214b40c 100644
--- a/CHANGELOG.mkd
+++ b/CHANGELOG.mkd
@@ -3,7 +3,6 @@ CHANGELOG
 
 Unreleased
 ----
-- Increase `pool_size` default to 4 from 1 [#1044](https://github.com/puppetlabs/r10k/pull/1044)
 - Add exec environment source type. The exec source type allows for the implementation of external environment sources [#1042](https://github.com/puppetlabs/r10k/pull/1042)
 
 3.4.1
diff --git a/lib/r10k/puppetfile.rb b/lib/r10k/puppetfile.rb
index 648e88541..070d93913 100644
--- a/lib/r10k/puppetfile.rb
+++ b/lib/r10k/puppetfile.rb
@@ -10,7 +10,7 @@ class Puppetfile
 
   include R10K::Settings::Mixin
 
-  def_setting_attr :pool_size, 4
+  def_setting_attr :pool_size, 1
 
   include R10K::Logging
 
diff --git a/lib/r10k/settings.rb b/lib/r10k/settings.rb
index e29602696..20333dc62 100644
--- a/lib/r10k/settings.rb
+++ b/lib/r10k/settings.rb
@@ -159,8 +159,8 @@ def self.global_settings
         }),
 
         Definition.new(:pool_size, {
-          :desc => "The amount of threads used to concurrently install modules. The default value is 4: install four modules at a time.",
-          :default => 4,
+          :desc => "The amount of threads used to concurrently install modules. The default value is 1: install one module at a time.",
+          :default => 1,
           :validate => lambda do |value|
             if !value.is_a?(Integer)
               raise ArgumentError, "The pool_size setting should be an integer, not a #{value.class}"