diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 Usage
 -----
 
-Cgrep 6.4.8 Usage: cgrep [OPTION] [PATTERN] files...
+Cgrep 6.4.9 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:             6.4.8
+Version:             6.4.9
 Synopsis:            Command line tool
 Homepage:            http://awgn.github.io/cgrep/
 License:             GPL-2
diff --git a/src/CGrep/Filter.hs b/src/CGrep/Filter.hs
--- a/src/CGrep/Filter.hs
+++ b/src/CGrep/Filter.hs
@@ -200,9 +200,11 @@
 filterFunctionMap = Map.fromList [
     (C,          mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
     (Cpp,        mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
+    (Cabal,      mkFilterFunction [("--", "\n")]                [("\"", "\"")] ),
     (Csharp,     mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
     (Chapel,     mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
     (Coffee,     mkFilterFunction [("###", "###"), ("#", "\n")]  [("\"", "\"")] ),
+    (Conf,       mkFilterFunction [("#", "\n")]    [("'", "'"), ("\"", "\"")] ),
     (D,          mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
     (Go,         mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
     (Java,       mkFilterFunction [("/*", "*/"), ("//", "\n")]  [("\"", "\"")] ),
diff --git a/src/CGrep/Lang.hs b/src/CGrep/Lang.hs
--- a/src/CGrep/Lang.hs
+++ b/src/CGrep/Lang.hs
@@ -28,7 +28,7 @@
 import Options
 import Util
 
-data Lang = Awk | C | Cpp | Csharp | Chapel | Coffee | Css | CMake | D | Erlang | Fsharp | Go | Haskell |
+data Lang = Awk | C | Cpp | Cabal | Csharp | Chapel | Coffee | Conf | Css | CMake | D | Erlang | Fsharp | Go | Haskell |
                 Html | Java | Javascript | Latex | Lua | Make | OCaml | ObjectiveC |
                 Perl | PHP | Python | Ruby | Scala | Tcl | Text | Shell | Verilog | VHDL | Vim
                     deriving (Read, Show, Eq, Ord, Bounded)
@@ -51,8 +51,10 @@
             (Awk,       [Ext "awk", Ext "mawk", Ext "gawk"]),
             (C,         [Ext "c", Ext "C"]),
             (Cpp,       [Ext "cpp", Ext "CPP", Ext "cxx", Ext "cc", Ext "cp", Ext "tcc", Ext "h", Ext "H", Ext "hpp", Ext "ipp", Ext "HPP", Ext "hxx", Ext "hh", Ext "hp"]),
+            (Cabal,     [Ext "cabal"]),
             (Csharp,    [Ext "cs", Ext "CS"]),
             (Coffee,    [Ext "coffee"]),
+            (Conf,      [Ext "conf", Ext "cfg", Ext "doxy"]),
             (Chapel,    [Ext "chpl"]),
             (Css,       [Ext "css"]),
             (CMake,     [Name "CMakeLists.txt", Ext "cmake"]),
@@ -75,7 +77,7 @@
             (Ruby,      [Ext "rb", Ext "ruby"]),
             (Scala,     [Ext "scala"]),
             (Tcl,       [Ext "tcl", Ext "tk"]),
-            (Text,      [Ext "txt", Ext "md", Ext "cabal", Ext "cfg", Name "README", Name "INSTALL"]),
+            (Text,      [Ext "txt", Ext "md", Name "README", Name "INSTALL"]),
             (Shell,     [Ext "sh", Ext "bash", Ext "csh", Ext "tcsh", Ext "ksh", Ext "zsh"]),
             (Verilog,   [Ext "v", Ext "vh", Ext "sv"]),
             (VHDL,      [Ext "vhd", Ext "vhdl"]),
diff --git a/src/Config.hs b/src/Config.hs
--- a/src/Config.hs
+++ b/src/Config.hs
@@ -31,7 +31,7 @@
 cgreprc = "cgreprc"
 
 version :: String
-version = "6.4.8"
+version = "6.4.9"
 
 data Config = Config
               {