diff --git a/templates/environment.j2 b/templates/environment.j2
index 1cad7f6..d0e7971 100644
--- a/templates/environment.j2
+++ b/templates/environment.j2
@@ -1,5 +1,5 @@
 {% if global_environment_variables is defined %}
-{%   for key, value in global_environment_variables.iteritems() %}
+{%   for key, value in global_environment_variables.items() %}
 {%     if value %}
 {{ key }}={{ value }}
 {%     endif %}