diff --git a/Network/CGI/Monad.hs b/Network/CGI/Monad.hs
--- a/Network/CGI/Monad.hs
+++ b/Network/CGI/Monad.hs
@@ -119,7 +119,7 @@
 
 -- | Catches any exception thrown by an CGI action, and returns either
 --   the exception, or if no exception was raised, the result of the action.
-tryCGI :: (MonadCGI m, MonadCatchIO m) => m a -> m (Either SomeException a)
+tryCGI :: (Functor m, MonadCGI m, MonadCatchIO m) => m a -> m (Either SomeException a)
 tryCGI = try
 
 {-# DEPRECATED handleExceptionCGI "Use catchCGI instead." #-}
diff --git a/cgi.cabal b/cgi.cabal
--- a/cgi.cabal
+++ b/cgi.cabal
@@ -1,5 +1,5 @@
 Name: cgi
-Version: 3001.1.8.4
+Version: 3001.1.8.5
 Copyright: Bjorn Bringert, Andy Gill, Anders Kaseorg, Ian Lynagh, 
            Erik Meijer, Sven Panne, Jeremy Shaw
 Category: Network