diff --git a/hedis.cabal b/hedis.cabal
--- a/hedis.cabal
+++ b/hedis.cabal
@@ -1,5 +1,5 @@
 name:               hedis
-version:            0.4
+version:            0.4.1
 synopsis:
     Client library for the Redis datastore: supports full command set,  
     pipelining.
@@ -36,8 +36,10 @@
     .
     [Changes since version 0.3.2]
     .
-    * Some commands got a 'Maybe' added to their return type, to properly handle
-        Redis returning @nil@-replies.
+    * The following commands got a 'Maybe' added to their return type, to
+      properly handle Redis returning @nil@-replies: @brpoplpush, lindex, lpop,
+      objectEncoding, randomkey, rpop, rpoplpush, spop, srandmember, zrank,
+      zrevrank, zscore@.
     .
     * Updated dependencies on @bytestring-lexing@ and @stm@.
     .
@@ -81,7 +83,7 @@
                     mtl == 2.*,
                     network == 2.*,
                     resource-pool == 0.2.1.*,
-                    stm == 2.3.*,
+                    stm >= 2.2 && < 2.4,
                     time
 
   other-modules:    Database.Redis.Core,