diff --git a/lib/kamal/configuration.rb b/lib/kamal/configuration.rb
index c5db6edf..32f11850 100644
--- a/lib/kamal/configuration.rb
+++ b/lib/kamal/configuration.rb
@@ -14,7 +14,7 @@ class Kamal::Configuration
 
   include Validation
 
-  PROXY_MINIMUM_VERSION = "v0.4.0"
+  PROXY_MINIMUM_VERSION = "v0.6.0"
   PROXY_HTTP_PORT = 80
   PROXY_HTTPS_PORT = 443