diff --git a/vcd.cabal b/vcd.cabal
--- a/vcd.cabal
+++ b/vcd.cabal
@@ -1,5 +1,5 @@
 name:    vcd
-version: 0.2.0
+version: 0.2.1
 
 category: Data, Hardware, Embedded
 
@@ -23,7 +23,7 @@
 library
     build-depends:
         base       >= 4.0   && < 5.0,
-        polyparse  >= 1.4   && < 1.5,
+        polyparse  >= 1.4   && < 1.6,
         improve    >= 0.1.0 && < 0.2
 
     exposed-modules: