diff --git a/server/RDSFactor.Designer.vb b/server/RDSFactor.Designer.vb
index a56e8b3..ba0b3fc 100644
--- a/server/RDSFactor.Designer.vb
+++ b/server/RDSFactor.Designer.vb
@@ -55,7 +55,7 @@ Partial Class RDSFactor
         'cleanupEvent
         '
         Me.cleanupEvent.Enabled = True
-        Me.cleanupEvent.Interval = 60000.0R
+        Me.cleanupEvent.Interval = garbageCollectionInterval
         '
         'RDSFactor
         '
diff --git a/server/RDSFactor.vb b/server/RDSFactor.vb
index 432080c..8ac1004 100644
--- a/server/RDSFactor.vb
+++ b/server/RDSFactor.vb
@@ -21,6 +21,7 @@ Public Class RDSFactor
 
     Public Shared SessionTimeOut As Integer = 30 ' in minutes
     Public Shared LaunchTimeOut As Integer = 30 ' in seconds
+    Public Shared garbageCollectionInterval As Integer = 60 * 60 * 1000 ' in millis
     Public Shared EnableSMS As Boolean = False
     Public Shared EnableEmail As Boolean = False