diff --git a/egison.cabal b/egison.cabal
--- a/egison.cabal
+++ b/egison.cabal
@@ -1,5 +1,5 @@
 Name:                egison
-Version:             4.1.0
+Version:             4.1.1
 Synopsis:            Programming language with non-linear pattern-matching against non-free data
 Description:
   An interpreter for Egison, a **pattern-matching-oriented**, purely functional programming language.
@@ -96,7 +96,7 @@
     , optparse-applicative
     , prettyprinter
     , unicode-show
-    , sweet-egison >= 0.1.0.2
+    , sweet-egison >= 0.1.1.2
   if !impl(ghc > 8.0)
     Build-Depends: fail
   Hs-Source-Dirs:  hs-src