diff --git a/manifests/init.pp b/manifests/init.pp
index 342dc8c..24149f5 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -380,11 +380,11 @@ class mastodon (
     ssl_honorcipherorder        => true,
     ssl_protocol                => 'all -SSLv3 -SSLv2 -TLSv1 -TLSv1.1',
     ssl_key                     => "/etc/letsencrypt/live/${hostname}/privkey.pem",
-    ssl_proxy_check_peer_cn     => true,
-    ssl_proxy_check_peer_expire => true,
+    ssl_proxy_check_peer_cn     => 'on',
+    ssl_proxy_check_peer_expire => 'on',
     ssl_proxyengine             => true,
     ssl_reload_on_change        => true,
-    allow_encoded_slashes       => true,
+    allow_encoded_slashes       => 'on',
     require                     => Exec["register-${hostname}-letsencrypt"],
   }
   apache::vhost { "${hostname}_insecure":