diff --git a/CHANGELOG.md b/CHANGELOG.md
index 277cbc9..6ce0e21 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,8 @@ The format is based on [Keep a Changelog](http://keepachangelog.com/)
 and this project adheres to [Semantic Versioning](http://semver.org/).
 
 ## [Unreleased]
+### Fixed
+- Python 3 compatibility
 
 ## [1.0.3] - 2018-06-05
 ### Added
diff --git a/templates/config/_macros.j2 b/templates/config/_macros.j2
index 4705c71..1eae127 100644
--- a/templates/config/_macros.j2
+++ b/templates/config/_macros.j2
@@ -4,7 +4,7 @@
         {%- if parameter is string or parameter is number -%}
             {{ parameter }}{{ '\n' }}
         {%- elif parameter is mapping -%}
-            {%- for parameter_key, parameter_value in parameter.iteritems() -%}
+            {%- for parameter_key, parameter_value in parameter.items() -%}
                 {%- if parameter_key not in exclusions -%}
                     {{ _config_parameter(parameter_key, parameter_value, indent) }}{{ '\n' }}
                 {%- endif -%}
@@ -17,7 +17,7 @@
     {%- set vars = {'values': []} -%}
     {%- for parameter in parameters -%}
         {%- if parameter is mapping -%}
-            {%- for parameter_key, parameter_value in parameter.iteritems() -%}
+            {%- for parameter_key, parameter_value in parameter.items() -%}
                 {%- if parameter_key == key -%}
                     {%- if vars.update({'values': vars['values'] + [parameter_value]}) -%}{%- endif -%}
                 {%- endif -%}