diff --git a/magic-wormhole.cabal b/magic-wormhole.cabal
--- a/magic-wormhole.cabal
+++ b/magic-wormhole.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: cf81a4ee4f4e09c4a0bd7523601d063291f43ceb3b0204078f4969fece93f825
+-- hash: 0b37cfac93f21cf11cee2216dec0d03c00b0dd0aa2cd74a0c3756bc5252ce6c7
 
 name:           magic-wormhole
-version:        0.3.0
+version:        0.3.1
 synopsis:       Interact with Magic Wormhole
 description:    Magic Wormhole is a scheme to get things from one computer to another,
                 safely.
@@ -98,7 +98,7 @@
       aeson
     , base >=4.6 && <5
     , bytestring
-    , hedgehog
+    , hedgehog >=0.6 && <1.0
     , magic-wormhole
     , memory
     , process