diff --git a/crdt.cabal b/crdt.cabal
--- a/crdt.cabal
+++ b/crdt.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 301e6350a3e473eacf8f9bbfbebaea6cb6c981e059849c0e4c7d68afd35cfe40
+-- hash: 23bb86a0781bcb24463115698ce7fa54478558dc1e341c509ce2db3b2f5a71d7
 
 name:           crdt
-version:        6.0
+version:        6.1
 synopsis:       Conflict-free replicated data types
 description:    Definitions of CmRDT and CvRDT. Implementations for some classic CRDTs.
 category:       Distributed Systems
diff --git a/lib/CRDT/LamportClock.hs b/lib/CRDT/LamportClock.hs
--- a/lib/CRDT/LamportClock.hs
+++ b/lib/CRDT/LamportClock.hs
@@ -30,8 +30,7 @@
 import           Data.Map.Strict (Map)
 import qualified Data.Map.Strict as Map
 import           Data.Maybe (fromMaybe)
-import           Data.Time (getCurrentTime)
-import           Data.Time.Clock.POSIX (utcTimeToPOSIXSeconds)
+import           Data.Time.Clock.POSIX (getPOSIXTime)
 import           Data.Word (Word64)
 import           Network.Info (MAC (MAC), getNetworkInterfaces, mac)
 import           Numeric (showHex)
@@ -76,7 +75,7 @@
         in (lt', Map.insert pid lt' m)
 
 getRealLocalTime :: IO LocalTime
-getRealLocalTime = round . (* 10 ^ 7) . utcTimeToPOSIXSeconds <$> getCurrentTime
+getRealLocalTime = round . (* 10000000) <$> getPOSIXTime
 
 getPidByMac :: IO Pid
 getPidByMac = Pid . decodeMac <$> getMac