diff --git a/progression.cabal b/progression.cabal
--- a/progression.cabal
+++ b/progression.cabal
@@ -1,5 +1,5 @@
 name:                progression
-version:             0.4
+version:             0.5
 synopsis:            Automates the recording and graphing of criterion benchmarks
 description:         Progression is a library that builds on the criterion
                      benchmarking library.  It stores the results of running
@@ -16,11 +16,11 @@
 maintainer:          neil@twistedsquare.com
 build-depends:       base >= 3 && < 5,
                      criterion >= 0.4 && < 0.6,
-                     directory,
+                     directory >= 1.0 && < 1.2,
                      txt-sushi >= 0.5 && < 0.6,
                      containers,
-                     process,
-                     filepath >= 1.1 && < 1.2,
+                     process >= 1.0 && < 1.1,
+                     filepath >= 1.1 && < 1.3,
                      haskeline >= 0.6 && < 0.7
 
 build-type:          Simple