diff --git a/buildbox.cabal b/buildbox.cabal
--- a/buildbox.cabal
+++ b/buildbox.cabal
@@ -1,5 +1,5 @@
 Name:                buildbox
-Version:             2.2.1.1
+Version:             2.2.1.2
 License:             BSD3
 License-file:        LICENSE
 Author:              Ben Lippmeier
@@ -21,8 +21,8 @@
 
 Library
   Build-Depends:
-        base           >= 4.4 && < 4.12,
-        containers     >= 0.4 && < 0.6,
+        base           >= 4.4 && < 4.13,
+        containers     >= 0.4 && < 0.7,
         bytestring     >= 0.9 && < 0.11,
         exceptions     >= 0.8 && < 0.11,
         old-locale     >= 1.0 && < 1.1,
@@ -32,7 +32,7 @@
         time           >= 1.2 && < 1.9,
         text           >= 1.2 && < 1.3,
         mtl            >= 2.2 && < 2.3,
-        stm            >= 2.4 && < 2.5
+        stm            >= 2.4 && < 2.6
 
   ghc-options:
         -Wall