diff --git a/CHANGELOG.md b/CHANGELOG.md
index 82559d0c..c6faca2c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,11 @@
 
 ## Changed
 
+- Web UI
+  - The web session expires after one hour without a request (was 200 seconds). The UI stops
+    polling while its tab is hidden, so with 200 seconds switching tabs for a few minutes logged
+    you out. `session <seconds>` still sets it.
+
 ## Fixed
 
 - Time
diff --git a/README.md b/README.md
index 25c0a02d..95115ecf 100644
--- a/README.md
+++ b/README.md
@@ -356,7 +356,7 @@ netmask zzz.zzz.zzz.zzz = Network mask of the switch
 port x name xxx         = Name xxx the port number x
 port z 1g               = Set 1g speed for port z
 igmp on/off             = Turn IGMP on or off
-session xxxx            = Web session timeout in seconds (default 200)
+session xxxx            = Web session timeout in seconds (default 3600)
 ```
 [To be continue]
 
diff --git a/httpd/httpd.c b/httpd/httpd.c
index 5128cabb..4932ad29 100644
--- a/httpd/httpd.c
+++ b/httpd/httpd.c
@@ -12,7 +12,7 @@
 // #define DEBUG
 #include "debug.h"
 
-#define SESSION_TIMEOUT_DEFAULT 200
+#define SESSION_TIMEOUT_DEFAULT 3600
 
 /* Seconds of inactivity after which a session cookie stops validating.
  * Configurable with the "session" command, see cmd_parser.c. */