diff --git a/lib/net/imap.rb b/lib/net/imap.rb
index 3c450ee8..b0fd5e53 100644
--- a/lib/net/imap.rb
+++ b/lib/net/imap.rb
@@ -719,7 +719,7 @@ module Net
   # * {IMAP URLAUTH Authorization Mechanism Registry}[https://www.iana.org/assignments/urlauth-authorization-mechanism-registry/urlauth-authorization-mechanism-registry.xhtml]
   #
   class IMAP < Protocol
-    VERSION = "0.5.0-dev"
+    VERSION = "0.5.0"
 
     # Aliases for supported capabilities, to be used with the #enable command.
     ENABLE_ALIASES = {