diff --git a/hist-pl-lexicon.cabal b/hist-pl-lexicon.cabal
--- a/hist-pl-lexicon.cabal
+++ b/hist-pl-lexicon.cabal
@@ -1,5 +1,5 @@
 name:               hist-pl-lexicon
-version:            0.3.0
+version:            0.3.1
 synopsis:           A binary representation of the historical dictionary of Polish
 description:
     The library provides a binary representation of the historical