diff --git a/tahoe-ssk.cabal b/tahoe-ssk.cabal
index 518d70cef3064108e0bd07f03474d33785ab353d..71b7cad44f3067117fd58648fdd8a8baa4b2dd52 100644
--- a/tahoe-ssk.cabal
+++ b/tahoe-ssk.cabal
@@ -132,7 +132,7 @@ library
 
   -- This dependency isn't ideal.  Move common bits out to
   -- another library.
-  build-depends:   tahoe-chk
+  build-depends:   tahoe-chk >=0.1 && <0.2
 
 test-suite tahoe-ssk-test
   import: