diff --git a/REFERENCE.md b/REFERENCE.md
index 6552a68..7393ca3 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -96,6 +96,7 @@ The following parameters are available in the `caddy` class:
 * [`manage_caddyfile`](#-caddy--manage_caddyfile)
 * [`caddyfile_source`](#-caddy--caddyfile_source)
 * [`caddyfile_content`](#-caddy--caddyfile_content)
+* [`config_file_extension`](#-caddy--config_file_extension)
 * [`config_dir`](#-caddy--config_dir)
 * [`purge_config_dir`](#-caddy--purge_config_dir)
 * [`config_enable_dir`](#-caddy--config_enable_dir)
@@ -382,6 +383,14 @@ Caddyfile content.
 
 Default value: `undef`
 
+##### <a name="-caddy--config_file_extension"></a>`config_file_extension`
+
+Data type: `Variant[Enum[''], Pattern[/^\./]]`
+
+Default extension for config and virtual host files (must include leading `.`)
+
+Default value: `'.conf'`
+
 ##### <a name="-caddy--config_dir"></a>`config_dir`
 
 Data type: `Stdlib::Absolutepath`
@@ -512,6 +521,7 @@ The following parameters are available in the `caddy::configfile` defined type:
 * [`content`](#-caddy--configfile--content)
 * [`config_dir`](#-caddy--configfile--config_dir)
 * [`enable_dir`](#-caddy--configfile--enable_dir)
+* [`file_extension`](#-caddy--configfile--file_extension)
 
 ##### <a name="-caddy--configfile--ensure"></a>`ensure`
 
@@ -553,6 +563,14 @@ Directory to symlink the config config file into (conf-enabled e.g.) if any.
 
 Default value: `$caddy::config_enable_dir`
 
+##### <a name="-caddy--configfile--file_extension"></a>`file_extension`
+
+Data type: `Variant[Enum[''], Pattern[/^\./]]`
+
+Default extension for the config file (must include leading `.`)
+
+Default value: `$caddy::config_file_extension`
+
 ### <a name="caddy--vhost"></a>`caddy::vhost`
 
 This defined type handles a Caddy virtual host
@@ -584,6 +602,7 @@ The following parameters are available in the `caddy::vhost` defined type:
 * [`content`](#-caddy--vhost--content)
 * [`config_dir`](#-caddy--vhost--config_dir)
 * [`enable_dir`](#-caddy--vhost--enable_dir)
+* [`file_extension`](#-caddy--vhost--file_extension)
 
 ##### <a name="-caddy--vhost--ensure"></a>`ensure`
 
@@ -625,6 +644,14 @@ Directory to symlink the vhost config file into (sites-enabled e.g.) if any.
 
 Default value: `$caddy::vhost_enable_dir`
 
+##### <a name="-caddy--vhost--file_extension"></a>`file_extension`
+
+Data type: `Variant[Enum[''], Pattern[/^\./]]`
+
+Default extension for the vhost config file (must include leading `.`)
+
+Default value: `$caddy::config_file_extension`
+
 ## Data types
 
 ### <a name="Caddy--Config"></a>`Caddy::Config`
diff --git a/manifests/config.pp b/manifests/config.pp
index 1ae1649..7f88a14 100644
--- a/manifests/config.pp
+++ b/manifests/config.pp
@@ -72,7 +72,8 @@
         $config_dir = $caddy::config_enable_dir.lest || { $caddy::config_dir }
         $vhost_dir = $caddy::vhost_enable_dir.lest || { $caddy::vhost_dir }
         epp('caddy/etc/caddy/caddyfile.epp',
-          include_dirs => unique([$config_dir, $vhost_dir])
+          include_dirs   => unique([$config_dir, $vhost_dir]),
+          file_extension => $caddy::config_file_extension,
         )
       }
     }
diff --git a/manifests/configfile.pp b/manifests/configfile.pp
index 895d4a7..a9048af 100644
--- a/manifests/configfile.pp
+++ b/manifests/configfile.pp
@@ -15,6 +15,9 @@
 # @param enable_dir
 #   Directory to symlink the config config file into (conf-enabled e.g.) if any.
 #
+# @param file_extension
+#   Default extension for the config file (must include leading `.`)
+#
 # @example Configure Caddy logging
 #   caddy::configfile { 'subdomain-log':
 #     source => 'puppet:///modules/caddy/etc/caddy/config/logging.conf',
@@ -40,6 +43,7 @@
   Optional[String] $content = undef,
   Stdlib::Absolutepath $config_dir = $caddy::config_dir,
   Optional[Stdlib::Absolutepath] $enable_dir = $caddy::config_enable_dir,
+  Variant[Enum[''], Pattern[/^\./]] $file_extension = $caddy::config_file_extension,
 ) {
   include caddy
 
@@ -52,7 +56,9 @@
     default  => 'file',
   }
 
-  file { "${config_dir}/${title}.conf":
+  $filename = "${title}${file_extension}"
+
+  file { "${config_dir}/${filename}":
     ensure  => $file_ensure,
     content => $content,
     source  => $source,
@@ -67,9 +73,9 @@
       default   => 'absent',
     }
 
-    file { "${enable_dir}/${title}.conf":
+    file { "${enable_dir}/${filename}":
       ensure  => $symlink_ensure,
-      target  => "${config_dir}/${title}.conf",
+      target  => "${config_dir}/${filename}",
       require => Class['caddy::config'],
       notify  => Class['caddy::service'],
     }
diff --git a/manifests/init.pp b/manifests/init.pp
index 2b092f2..29d429f 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -120,6 +120,9 @@
 # @param caddyfile_content
 #   Caddyfile content.
 #
+# @param config_file_extension
+#   Default extension for config and virtual host files (must include leading `.`)
+#
 # @param config_dir
 #  Where to store Caddy configs.
 #  Set this to /etc/caddy/conf-available to simulate nginx/apache behavior
@@ -201,6 +204,7 @@
   Boolean                        $purge_config_enable_dir         = $purge_config_dir,
   Boolean                        $purge_vhost_dir                 = $purge_config_dir,
   Boolean                        $purge_vhost_enable_dir          = $purge_vhost_dir,
+  Variant[Enum[''], Pattern[/^\./]]   $config_file_extension      = '.conf',
   Hash[String[1], Caddy::Config]      $config_files               = {},
   Hash[String[1], Caddy::VirtualHost] $vhosts                     = {},
 ) {
diff --git a/manifests/vhost.pp b/manifests/vhost.pp
index eaae231..aeec63b 100644
--- a/manifests/vhost.pp
+++ b/manifests/vhost.pp
@@ -15,6 +15,9 @@
 # @param enable_dir
 #   Directory to symlink the vhost config file into (sites-enabled e.g.) if any.
 #
+# @param file_extension
+#   Default extension for the vhost config file (must include leading `.`)
+#
 # @example Configure virtual host, based on source
 #   caddy::vhost { 'example1':
 #     source => 'puppet:///modules/caddy/etc/caddy/config/example1.conf',
@@ -31,6 +34,7 @@
   Optional[String] $content = undef,
   Stdlib::Absolutepath $config_dir = $caddy::vhost_dir,
   Optional[Stdlib::Absolutepath] $enable_dir = $caddy::vhost_enable_dir,
+  Variant[Enum[''], Pattern[/^\./]] $file_extension = $caddy::config_file_extension,
 ) {
   include caddy
 
@@ -43,7 +47,9 @@
     default  => 'file',
   }
 
-  file { "${config_dir}/${title}.conf":
+  $filename = "${title}${file_extension}"
+
+  file { "${config_dir}/${filename}":
     ensure  => $file_ensure,
     content => $content,
     source  => $source,
@@ -58,9 +64,9 @@
       default   => 'absent',
     }
 
-    file { "${enable_dir}/${title}.conf":
+    file { "${enable_dir}/${filename}":
       ensure  => $symlink_ensure,
-      target  => "${config_dir}/${title}.conf",
+      target  => "${config_dir}/${filename}",
       require => Class['caddy::config'],
       notify  => Class['caddy::service'],
     }
diff --git a/spec/acceptance/init_spec.rb b/spec/acceptance/init_spec.rb
index 72bee9c..45c7884 100644
--- a/spec/acceptance/init_spec.rb
+++ b/spec/acceptance/init_spec.rb
@@ -113,6 +113,7 @@ class { 'caddy':
             config_enable_dir => '/etc/caddy/conf-enabled',
             vhost_dir => '/etc/caddy/sites-available',
             vhost_enable_dir => '/etc/caddy/sites-enabled',
+            config_file_extension => '.caddyfile',
             config_files => {
               admin_2020 => {
                 content => "{\n  admin localhost:2020\n}\n",
diff --git a/spec/classes/init_spec.rb b/spec/classes/init_spec.rb
index 4dfeafd..9eab336 100644
--- a/spec/classes/init_spec.rb
+++ b/spec/classes/init_spec.rb
@@ -511,6 +511,18 @@
         end
       end
 
+      context 'with config_file_extension set' do
+        let(:params) { { config_file_extension: '.caddyfile' } }
+
+        it { is_expected.to contain_file('/etc/caddy/Caddyfile').with_content(%r{^import /etc/caddy/config/\*\.caddyfile$}) }
+      end
+
+      context 'with config_file_extension set to an empty string' do
+        let(:params) { { config_file_extension: '' } }
+
+        it { is_expected.to contain_file('/etc/caddy/Caddyfile').with_content(%r{^import /etc/caddy/config/\*$}) }
+      end
+
       context 'with configs set' do
         let(:params) do
           {
diff --git a/spec/defines/configfile_spec.rb b/spec/defines/configfile_spec.rb
index 5da4133..c9764c2 100644
--- a/spec/defines/configfile_spec.rb
+++ b/spec/defines/configfile_spec.rb
@@ -64,6 +64,12 @@
           it { is_expected.to contain_file('/etc/caddy/config/example.conf').with_ensure('absent') }
         end
 
+        context 'with file_extension set' do
+          let(:params) { super().merge(file_extension: '.caddyfile') }
+
+          it { is_expected.to contain_file('/etc/caddy/config/example.caddyfile').with_ensure('file') }
+        end
+
         context 'with custom title' do
           let(:title) { 'test' }
 
diff --git a/spec/defines/vhost_spec.rb b/spec/defines/vhost_spec.rb
index 254cc8d..ce2b948 100644
--- a/spec/defines/vhost_spec.rb
+++ b/spec/defines/vhost_spec.rb
@@ -64,6 +64,12 @@
           it { is_expected.to contain_file('/etc/caddy/config/example.conf').with_ensure('absent') }
         end
 
+        context 'with file_extension set' do
+          let(:params) { super().merge(file_extension: '.caddyfile') }
+
+          it { is_expected.to contain_file('/etc/caddy/config/example.caddyfile').with_ensure('file') }
+        end
+
         context 'with custom title' do
           let(:title) { 'test' }
 
diff --git a/templates/etc/caddy/caddyfile.epp b/templates/etc/caddy/caddyfile.epp
index 2d45d26..d79adb8 100644
--- a/templates/etc/caddy/caddyfile.epp
+++ b/templates/etc/caddy/caddyfile.epp
@@ -1,10 +1,11 @@
 <%- |
   Array[String[1]] $include_dirs,
+  String $file_extension,
 | -%>
 #
 # THIS FILE IS MANAGED BY PUPPET
 #
 
 <%- $include_dirs.each |$dir| { -%>
-import <%= $dir %>/*.conf
+import <%= $dir %>/*<%= $file_extension %>
 <%- } -%>