diff --git a/src/Csound.hs b/src/Csound.hs
--- a/src/Csound.hs
+++ b/src/Csound.hs
@@ -130,7 +130,7 @@
 
 import Temporal.Media(Track)
 import Csound.Base
-import Temporal.Music.Western.P12 hiding (delay, event, line, chord, tone)
+import Temporal.Music.Western.P12 hiding (delay, line, tone)
 
 instance CsdSco (Track Double) where
     toCsdEventList x = CsdEventList (dur x) (fmap toEvt $ render x)
diff --git a/temporal-csound.cabal b/temporal-csound.cabal
--- a/temporal-csound.cabal
+++ b/temporal-csound.cabal
@@ -2,7 +2,7 @@
 -- documentation, see http://haskell.org/cabal/users-guide/
 
 name:                temporal-csound
-version:             0.4.0
+version:             0.4.1
 synopsis:            library to make electronic music, brings together temporal-music-notation and csound-expression packages
 license:             BSD3
 license-file:        LICENSE
@@ -24,7 +24,7 @@
     You can find the short intro in the module "Csound".
     .
     * The tutorial for csound-epression packageb (timbres):
-        <https://github.com/anton-k/csound-expression/blob/master/tutorial/QuickStart.markdown> 
+        <https://github.com/anton-k/csound-expression/blob/master/tutorial/Index.md> 
     .
     * The tutorial for temporal-music-notation package (composition)
          and temporal-music-notation-western package (standard names for notes): see module "Csound"    
@@ -79,5 +79,5 @@
   -- other-modules:       
   build-depends:       
     base >= 4, base < 5, temporal-music-notation>=0.4, 
-    csound-expression>=4.0.0, csound-catalog>=0.2.0,
+    csound-expression>=4.2.0, csound-catalog>=0.2.0,
     temporal-media >= 0.4, temporal-music-notation-western>=0.4.0