diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,4 +1,9 @@
 
+Version 0.3
+-----
+
+* Using the mwc-random package for generating random numbers by default.
+
 Version 0.2
 -----
 
diff --git a/Simulation/Aivika/RealTime/Generator.hs b/Simulation/Aivika/RealTime/Generator.hs
--- a/Simulation/Aivika/RealTime/Generator.hs
+++ b/Simulation/Aivika/RealTime/Generator.hs
@@ -18,8 +18,10 @@
 import Control.Monad.Trans
 
 import System.Random
+import qualified System.Random.MWC as MWC
 
 import Data.IORef
+import Data.Vector
 
 import Simulation.Aivika.Trans.Generator
 import Simulation.Aivika.Trans.Generator.Primitive
@@ -85,9 +87,15 @@
   newGenerator tp =
     case tp of
       SimpleGenerator ->
-        liftIO newStdGen >>= newRandomGenerator
+        do let g = MWC.uniform <$>
+                   MWC.withSystemRandom (return :: MWC.GenIO -> IO MWC.GenIO)
+           g' <- liftIO g
+           newRandomGenerator01 (liftIO g')
       SimpleGeneratorWithSeed x ->
-        newRandomGenerator $ mkStdGen x
+        do let g = MWC.uniform <$>
+                   MWC.initialize (singleton x)
+           g' <- liftIO g
+           newRandomGenerator01 (liftIO g')
       CustomGenerator g ->
         g
       CustomGenerator01 g ->
diff --git a/aivika-realtime.cabal b/aivika-realtime.cabal
--- a/aivika-realtime.cabal
+++ b/aivika-realtime.cabal
@@ -1,5 +1,5 @@
 name:            aivika-realtime
-version:         0.2
+version:         0.3
 synopsis:        Soft real-time simulation module for the Aivika library
 description:
     This package allows running soft real-time simulations based on the aivika-transformers [1] library.
@@ -43,10 +43,12 @@
                      stm >= 2.4.2,
                      containers >= 0.4.0.0,
                      random >= 1.0.0.3,
+                     mwc-random >= 0.13.0.0,
                      async >= 2.0,
                      time >= 1.5.0.1,
-                     aivika >= 5.1,
-                     aivika-transformers >= 5.1
+                     vector >= 0.10.0.1,
+                     aivika >= 5.2,
+                     aivika-transformers >= 5.2
 
     extensions:      TypeFamilies,
                      MultiParamTypeClasses,