diff --git a/ekg-rrd.cabal b/ekg-rrd.cabal
--- a/ekg-rrd.cabal
+++ b/ekg-rrd.cabal
@@ -1,5 +1,5 @@
 name:                ekg-rrd
-version:             0.2.0.14
+version: 0.2.1.65
 synopsis:            Passes ekg statistics to rrdtool
 description:         Simple API for passing ekg monitoring statistics to a round-robin database (RRD) using rrdtool.
 homepage:            https://bitbucket.org/davecturner/ekg-rrd
@@ -16,7 +16,7 @@
   exposed-modules:      System.Metrics.RRDTool
                       , System.Metrics.RRDTool.Internals
   build-depends:       base >=4.7 && <4.8
-                      , text == 1.2.*
+                      , text >= 1.1
                       , unordered-containers == 0.2.*
                       , process == 1.2.*
                       , ekg-core == 0.1.*
@@ -52,5 +52,5 @@
 source-repository this
   type: hg
   location: https://bitbucket.org/davecturner/ekg-rrd
-  tag: 7b9d021c5a43e4a7ef8b42505a30dd971c9b93f9
+  tag: f75f521cc764bc2079f5c67a112345bf7a8a2b0d
 
diff --git a/src/System/Metrics/RRDTool.hs b/src/System/Metrics/RRDTool.hs
--- a/src/System/Metrics/RRDTool.hs
+++ b/src/System/Metrics/RRDTool.hs
@@ -26,6 +26,7 @@
   , MonitorThread
   , runMonitor
   , killMonitor
+  , nullMonitor
   ) where
 
 import Control.Concurrent
@@ -102,3 +103,7 @@
     case updateRRDArgs rrd sample now of
       Nothing -> return ()
       Just args -> handle ignoreIOException $ runTool rrd args
+
+{- | A do-nothing MonitorThread, for use if monitoring is disabled. -}
+nullMonitor :: MonitorThread
+nullMonitor = MonitorThread $ return ()