diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 Usage
 -----
 
-Cgrep 6.4 Usage: cgrep [OPTION] [PATTERN] files...
+Cgrep 6.4.1 Usage: cgrep [OPTION] [PATTERN] files...
 
 cgrep [OPTIONS] [ITEM]
 
diff --git a/cgrep.cabal b/cgrep.cabal
--- a/cgrep.cabal
+++ b/cgrep.cabal
@@ -1,6 +1,6 @@
 Name:                cgrep
 Description:         Cgrep: a context-aware grep for source codes
-Version:             6.4
+Version:             6.4.1
 Synopsis:            Command line tool
 Homepage:            http://awgn.github.io/cgrep/
 License:             GPL-2
@@ -25,8 +25,8 @@
                        BangPatterns, 
                        FlexibleInstances, 
                        FlexibleContexts
-  other-modules:       Debug Options CmdOptions Util Config CGrep.Lang CGrep.Filter CGrep.Token CGrep.Types CGrep.CGrep CGrep.Output CGrep.Distance CGrep.Common CGrep.Context CGrep.Semantic.WildCard CGrep.Semantic.Generic.Token CGrep.Semantic.Token CGrep.Semantic.Cpp.Token CGrep.Strategy.Generic.Semantic CGrep.Strategy.Levenshtein CGrep.Strategy.BoyerMoore CGrep.Strategy.Cpp.Tokenizer CGrep.Strategy.Cpp.Semantic CGrep.Strategy.Regex
-  Build-Depends:       base >=4.6 && < 4.7, 
+  Other-Modules:       Debug Options CmdOptions Util Config CGrep.Lang CGrep.Filter CGrep.Token CGrep.Types CGrep.CGrep CGrep.Output CGrep.Distance CGrep.Common CGrep.Context CGrep.Semantic.WildCard CGrep.Semantic.Generic.Token CGrep.Semantic.Token CGrep.Semantic.Cpp.Token CGrep.Strategy.Generic.Semantic CGrep.Strategy.Levenshtein CGrep.Strategy.BoyerMoore CGrep.Strategy.Cpp.Tokenizer CGrep.Strategy.Cpp.Semantic CGrep.Strategy.Regex
+  Build-Depends:       base >=4.6 && < 4.8, 
                        cmdargs >=0.10, 
                        bytestring >=0.10, 
                        directory >=1.2, 
diff --git a/src/Config.hs b/src/Config.hs
--- a/src/Config.hs
+++ b/src/Config.hs
@@ -31,8 +31,7 @@
 cgreprc = "cgreprc"
 
 version :: String
-version = "6.4"
-
+version = "6.4.1"
 
 data Config = Config
               {