diff --git a/dotgnupg/gpg-agent.conf b/dotgnupg/gpg-agent.conf
index 0011f5c..c1870f7 100644
--- a/dotgnupg/gpg-agent.conf
+++ b/dotgnupg/gpg-agent.conf
@@ -1,12 +1,15 @@
 #pinentry-program /usr/bin/pinentry-curses
 #no-grab
 
+# Emacs support
+#allow-emacs-pinentry
+
 #
 # How long to cache credentials?
 #
-# I set this up for a nominal 8 hour working day but
+# I set this up for a nominal 12 hour working day but
 # each time a login shell is executed the credentials
 # are flushed.
 #
-default-cache-ttl 28800
-max-cache-ttl     28800
+default-cache-ttl 43200
+max-cache-ttl     43200