diff --git a/manifests/init.pp b/manifests/init.pp
index feac219..766704a 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -29,7 +29,7 @@ class ec2api (
   Boolean $package_manage = true,
   String[1] $package_name = $::ec2api::params::package_name,
   $package_provider       = undef,
-  $purge_config           = false,
+  Boolean $purge_config   = false,
 ) inherits ec2api::params {
 
   include ec2api::deps
diff --git a/manifests/policy.pp b/manifests/policy.pp
index a6aa224..9fc74c6 100644
--- a/manifests/policy.pp
+++ b/manifests/policy.pp
@@ -52,7 +52,7 @@ class ec2api::policy (
   $policy_path          = '/etc/ec2api/policy.yaml',
   $policy_default_rule  = $facts['os_service_default'],
   $policy_dirs          = $facts['os_service_default'],
-  $purge_config         = false,
+  Boolean $purge_config = false,
 ) {
 
   include ec2api::deps