diff --git a/supervisor/session/coordinator.lua b/supervisor/session/coordinator.lua
index 429e69a..3ffa89f 100644
--- a/supervisor/session/coordinator.lua
+++ b/supervisor/session/coordinator.lua
@@ -15,7 +15,7 @@ local print_ts = util.print_ts
 local println_ts = util.println_ts
 
 local PERIODICS = {
-    KEEP_ALIVE = 2.0
+    KEEP_ALIVE = 2000
 }
 
 -- coordinator supervisor session
diff --git a/supervisor/session/plc.lua b/supervisor/session/plc.lua
index 0039bc3..5229b70 100644
--- a/supervisor/session/plc.lua
+++ b/supervisor/session/plc.lua
@@ -33,7 +33,7 @@ plc.PLC_S_CMDS = PLC_S_CMDS
 plc.PLC_S_DATA = PLC_S_DATA
 
 local PERIODICS = {
-    KEEP_ALIVE = 2.0
+    KEEP_ALIVE = 2000
 }
 
 -- PLC supervisor session
diff --git a/supervisor/session/rtu.lua b/supervisor/session/rtu.lua
index ca4e467..51f7e21 100644
--- a/supervisor/session/rtu.lua
+++ b/supervisor/session/rtu.lua
@@ -39,7 +39,7 @@ rtu.RTU_S_CMDS = RTU_S_CMDS
 rtu.RTU_S_DATA = RTU_S_DATA
 
 local PERIODICS = {
-    KEEP_ALIVE = 2.0
+    KEEP_ALIVE = 2000
 }
 
 ---@class rs_session_command
diff --git a/supervisor/startup.lua b/supervisor/startup.lua
index cdf3426..5533d74 100644
--- a/supervisor/startup.lua
+++ b/supervisor/startup.lua
@@ -13,7 +13,7 @@ local svsessions = require("supervisor.session.svsessions")
 local config     = require("supervisor.config")
 local supervisor = require("supervisor.supervisor")
 
-local SUPERVISOR_VERSION = "beta-v0.5.1"
+local SUPERVISOR_VERSION = "beta-v0.5.2"
 
 local print = util.print
 local println = util.println