diff --git a/changes.txt b/changes.txt
--- a/changes.txt
+++ b/changes.txt
@@ -1,3 +1,8 @@
+** 1.2.0.1
+* Bumped version bound on containers. Pull request contributed by mstksg
+* Finally fixed long-standing error in insertInforming
+
+
 ** 1.2.0.0
 * fix build warning on GHC 7.10
 * add insertInforming
diff --git a/lrucache.cabal b/lrucache.cabal
--- a/lrucache.cabal
+++ b/lrucache.cabal
@@ -1,5 +1,5 @@
 Name:                lrucache
-Version:             1.2.0.0
+Version:             1.2.0.1
 Synopsis:            a simple, pure LRU cache
 License:             BSD3
 License-file:        LICENSE
@@ -30,7 +30,7 @@
 Source-repository this
   type:              git
   location:          https://github.com/chowells79/lrucache.git
-  tag:               1.2.0.0
+  tag:               1.2.0.1
 
 Library
   Exposed-modules:
@@ -41,7 +41,7 @@
 
   Build-depends:
         base >= 4 && < 5,
-        containers >= 0.2 && < 0.6,
+        containers >= 0.2 && < 0.7,
         contravariant >= 0.5 && < 2
 
 
diff --git a/src/Data/Cache/LRU/Internal.hs b/src/Data/Cache/LRU/Internal.hs
--- a/src/Data/Cache/LRU/Internal.hs
+++ b/src/Data/Cache/LRU/Internal.hs
@@ -143,7 +143,7 @@
 
       -- create a new LRU with a new first item, and
       -- conditionally dropping the last item
-      add firstKey = if full then (lru'', Just (key, val))
+      add firstKey = if full then (lru'', Just (lastKey, value lastLV))
                      else (lru', Nothing)
           where
             -- add a new first item