diff --git a/hedis.cabal b/hedis.cabal
--- a/hedis.cabal
+++ b/hedis.cabal
@@ -1,5 +1,5 @@
 name:               hedis
-version:            0.6.1
+version:            0.6.2
 synopsis:
     Client library for the Redis datastore: supports full command set,  
     pipelining.
@@ -95,7 +95,7 @@
                     network == 2.*,
                     resource-pool == 0.2.*,
                     time,
-                    vector == 0.9.*
+                    vector >= 0.9 && < 0.11
 
   other-modules:    Database.Redis.Core,
                     Database.Redis.ProtocolPipelining,
diff --git a/test/Test.hs b/test/Test.hs
--- a/test/Test.hs
+++ b/test/Test.hs
@@ -70,7 +70,7 @@
 testConstantSpacePipelining = testCase "constant-space pipelining" $ do
     -- This testcase should not exceed the maximum heap size, as set in
     -- the run-test.sh script.
-    replicateM_ 100000 ping
+    replicateM_ 1000000 ping
     -- If the program didn't crash, pipelining takes constant memory.
     assert True