diff --git a/confsolve.cabal b/confsolve.cabal
--- a/confsolve.cabal
+++ b/confsolve.cabal
@@ -1,5 +1,5 @@
 name: confsolve
-version: 0.5
+version: 0.5.1
 cabal-version: >=1.6
 build-type: Simple
 license: BSD3
@@ -24,7 +24,7 @@
         process >=1.1.0.2 && <1.2,
         unordered-containers >=0.2.4.0 && <0.3,
         text >=1.1.1.2 && <1.2,
-        attoparsec >=0.11.3.0 && <0.12,
+        attoparsec >=0.11.3.0 && <0.13,
         system-filepath >=0.4.8 && <0.5,
         system-fileio >=0.3.13 && <0.4,
         cmdargs >=0.10.7 && <0.11