diff --git a/src/PVE/ACME/DNSChallenge.pm b/src/PVE/ACME/DNSChallenge.pm
index 7214d88..3e86f8c 100644
--- a/src/PVE/ACME/DNSChallenge.pm
+++ b/src/PVE/ACME/DNSChallenge.pm
@@ -56,7 +56,12 @@ sub properties {
 	    optional => 1,
 	    minimum => 0,
 	    maximum => 2 * 24 * 60 * 60,
-	}
+	},
+	'use-proxy' => {
+	    description => "Flag indicating whether a http proxy should be used.",
+	    type => 'boolean',
+	    optional => 1,
+	},
     };
 }
 
@@ -67,6 +72,7 @@ sub options {
 	nodes => { optional => 1 },
 	disable => { optional => 1 },
 	'validation-delay' => { optional => 1 },
+	'use-proxy' => { optional => 1 },
     };
 }
 
@@ -84,6 +90,7 @@ my $proxmox_acme_command = sub {
     my $txtvalue = PVE::ACME::encode(sha256($key_auth));
     my $dnsplugin = $data->{plugin}->{api};
     my $plugin_conf_string = $data->{plugin}->{data};
+    my $proxy = $data->{plugin}->{proxy};
 
     # for security reasons, we execute the command as nobody
     # we can't verify that the code of the DNSPlugins are harmless.
@@ -99,6 +106,7 @@ my $proxmox_acme_command = sub {
     }
     my $input = "$txtvalue\n";
     $input .= "$plugin_conf_string\n" if $plugin_conf_string;
+    $input .= "https_proxy=$proxy\nhttp_proxy=$proxy\n" if $proxy;
 
     PVE::Tools::run_command($cmd, input => $input);