diff --git a/synthesizer-core.cabal b/synthesizer-core.cabal
--- a/synthesizer-core.cabal
+++ b/synthesizer-core.cabal
@@ -1,5 +1,5 @@
 Name:           synthesizer-core
-Version:        0.8.2
+Version:        0.8.2.1
 License:        GPL
 License-File:   LICENSE
 Author:         Henning Thielemann <haskell@henning-thielemann.de>
@@ -38,7 +38,7 @@
 
 
 Source-Repository this
-  Tag:         0.8.2
+  Tag:         0.8.2.1
   Type:        darcs
   Location:    http://code.haskell.org/synthesizer/core/
 
@@ -68,7 +68,7 @@
     storable-tuple >=0.0.1 && <0.1,
     QuickCheck >=1 && <3,
     array >=0.1 && <0.6,
-    containers >=0.1 && <0.6,
+    containers >=0.1 && <0.7,
     random >=1.0 && <2.0,
     process >=1.0 && <1.7,
     base >= 4 && <5
@@ -284,7 +284,7 @@
   Build-Depends:
     synthesizer-core,
     numeric-prelude,
-    timeit >=1.0 && <1.1,
+    timeit >=1.0 && <3,
     storablevector >=0.2.7 && <0.3,
     storable-tuple >=0.0.1 && <0.1,
     utility-ht >=0.0.5 && <0.1,