diff --git a/REFERENCE.md b/REFERENCE.md
index 984ead86..ca10ff34 100644
--- a/REFERENCE.md
+++ b/REFERENCE.md
@@ -1857,7 +1857,7 @@ Default value: `undef`
 
 ##### <a name="-peadm--install--pe_installer_source"></a>`pe_installer_source`
 
-Data type: `Optional[String]`
+Data type: `Optional[Stdlib::HTTPSUrl]`
 
 The URL to download the Puppet Enterprise installer media from. If not
 specified, PEAdm will attempt to download PE installation media from its
@@ -2319,7 +2319,7 @@ Default value: `undef`
 
 ##### <a name="-peadm--upgrade--pe_installer_source"></a>`pe_installer_source`
 
-Data type: `Optional[String]`
+Data type: `Optional[Stdlib::HTTPSUrl]`
 
 The URL to download the Puppet Enterprise installer media from. If not
 specified, PEAdm will attempt to download PE installation media from its
diff --git a/plans/install.pp b/plans/install.pp
index cd75f13f..4e7c9ab2 100644
--- a/plans/install.pp
+++ b/plans/install.pp
@@ -46,7 +46,7 @@
   # Common Configuration
   String                            $console_password,
   Peadm::Pe_version                 $version                          = '2021.7.8',
-  Optional[String]                  $pe_installer_source              = undef,
+  Optional[Stdlib::HTTPSUrl]        $pe_installer_source              = undef,
   Optional[Array[String]]           $dns_alt_names                    = undef,
   Optional[String]                  $compiler_pool_address            = undef,
   Optional[String]                  $internal_compiler_a_pool_address = undef,
diff --git a/plans/subplans/install.pp b/plans/subplans/install.pp
index 0ecbd6bf..7d48cb8a 100644
--- a/plans/subplans/install.pp
+++ b/plans/subplans/install.pp
@@ -49,7 +49,7 @@
   # Common Configuration
   String               $console_password,
   Peadm::Pe_version    $version,
-  Optional[String]     $pe_installer_source = undef,
+  Optional[Stdlib::HTTPSUrl] $pe_installer_source = undef,
   Array[String]        $dns_alt_names       = [],
   Hash                 $pe_conf_data        = {},
 
diff --git a/plans/upgrade.pp b/plans/upgrade.pp
index f1b340b7..b9adcd38 100644
--- a/plans/upgrade.pp
+++ b/plans/upgrade.pp
@@ -45,7 +45,7 @@
 
   # Common Configuration
   Optional[Peadm::Pe_version]  $version                          = undef,
-  Optional[String]             $pe_installer_source              = undef,
+  Optional[Stdlib::HTTPSUrl]   $pe_installer_source              = undef,
   Optional[String]             $compiler_pool_address            = undef,
   Optional[String]             $internal_compiler_a_pool_address = undef,
   Optional[String]             $internal_compiler_b_pool_address = undef,