diff --git a/main/zh_gateway.h b/main/zh_gateway.h
index 1b7bbe1..ce21d34 100755
--- a/main/zh_gateway.h
+++ b/main/zh_gateway.h
@@ -64,7 +64,7 @@
 
 #define ZH_MAX_GPIO_NUMBERS 48 // Maximum number of GPIOs on ESP modules.
 
-#define ZH_GATEWAY_KEEP_ALIVE_TIME 10 // Frequency of sending a keep alive message.
+#define ZH_GATEWAY_KEEP_ALIVE_TIME 10 // Frequency of sending a keep alive message (in seconds).
 
 typedef struct // Structure of data exchange between tasks, functions and event handlers.
 {
diff --git a/version.txt b/version.txt
index 3529e98..e5a4a5e 100755
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.8-5
\ No newline at end of file
+1.0.9
\ No newline at end of file