diff --git a/string-random.cabal b/string-random.cabal
--- a/string-random.cabal
+++ b/string-random.cabal
@@ -1,89 +1,79 @@
 cabal-version: 1.12
+name:          string-random
+version:       0.1.4.0
+synopsis:
+  A library for generating random string from a regular experession
 
--- This file has been generated from package.yaml by hpack version 0.33.0.
---
--- see: https://github.com/sol/hpack
---
--- hash: fa58d59933cbb63acc6f6b5b8fc0952e8c53ae7d87b1620cdec86259ef329e2c
+description:
+  With this package you can generate random strings from
+  regular expressions. If you are using QuickCheck, you can
+  also check the quickcheck-string-random package.
 
-name:           string-random
-version:        0.1.3.0
-synopsis:       A library for generating random string from a regular experession
-description:    With this package you can generate random strings from
-                regular expressions. If you are using QuickCheck, you can
-                also check the quickcheck-string-random package.
-category:       Text
-homepage:       https://github.com/hiratara/hs-string-random#readme
-bug-reports:    https://github.com/hiratara/hs-string-random/issues
-author:         Masahiro Honma
-maintainer:     hiratara@cpan.org
-copyright:      Copyright (C) 2016- hiratara
-license:        BSD3
-license-file:   LICENSE
-tested-with:    GHC==8.0.1
-build-type:     Simple
+category:      Text
+homepage:      https://github.com/hiratara/hs-string-random#readme
+bug-reports:   https://github.com/hiratara/hs-string-random/issues
+author:        Masahiro Honma
+maintainer:    hiratara@cpan.org
+copyright:     Copyright (C) 2016- hiratara
+license:       BSD3
+license-file:  LICENSE
+tested-with:   GHC ==8.10.3
+build-type:    Simple
 
 source-repository head
-  type: git
+  type:     git
   location: https://github.com/hiratara/hs-string-random
 
 library
+  -- cabal-fmt: expand src
   exposed-modules:
-      Text.StringRandom
-      Text.StringRandom.Parser
-  other-modules:
-      Paths_string_random
-  hs-source-dirs:
-      src
+    Text.StringRandom
+    Text.StringRandom.Parser
+
+  hs-source-dirs:   src
   build-depends:
-      attoparsec >=0.13.1 && <0.14
-    , base >=4.9 && <5
-    , containers >=0.5.7.1 && <0.7
-    , random >=1.1 && <1.3
-    , text >=1.2.2.1 && <1.3
-    , transformers >=0.5.2.0 && <0.6
+      attoparsec    >=0.13.1  && <0.14
+    , base          >=4.9     && <5
+    , containers    >=0.5.7.1 && <0.7
+    , random        >=1.1     && <1.3
+    , text          >=1.2.2.1 && <1.3
+    , transformers  >=0.5.2.0 && <0.6
+
   default-language: Haskell2010
 
 executable hstrrand
-  main-is: hstrrand.hs
-  other-modules:
-      Paths_string_random
-  hs-source-dirs:
-      app
-  ghc-options: -O2 -threaded -Wall
+  main-is:          hstrrand.hs
+  hs-source-dirs:   app
+  ghc-options:      -O2 -threaded -Wall
   build-depends:
-      base >=4.9 && <5
+      base                  >=4.9 && <5
     , optparse-applicative
     , string-random
     , text
+
   default-language: Haskell2010
 
 test-suite string-random-quickcheck
-  type: exitcode-stdio-1.0
-  main-is: string-random-quickcheck.hs
-  other-modules:
-      Paths_string_random
-  hs-source-dirs:
-      test
-  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  type:             exitcode-stdio-1.0
+  main-is:          string-random-quickcheck.hs
+  hs-source-dirs:   test
+  ghc-options:      -threaded -rtsopts -with-rtsopts=-N
   build-depends:
-      QuickCheck
-    , base
+      base
     , pcre-heavy
+    , QuickCheck
     , string-random
     , tasty
     , tasty-quickcheck
     , text
+
   default-language: Haskell2010
 
 test-suite string-random-test
-  type: exitcode-stdio-1.0
-  main-is: string-random-test.hs
-  other-modules:
-      Paths_string_random
-  hs-source-dirs:
-      test
-  ghc-options: -threaded -rtsopts -with-rtsopts=-N
+  type:             exitcode-stdio-1.0
+  main-is:          string-random-test.hs
+  hs-source-dirs:   test
+  ghc-options:      -threaded -rtsopts -with-rtsopts=-N
   build-depends:
       base
     , bytestring
@@ -92,4 +82,5 @@
     , tasty
     , tasty-hunit
     , text
+
   default-language: Haskell2010
diff --git a/test/string-random-quickcheck.hs b/test/string-random-quickcheck.hs
--- a/test/string-random-quickcheck.hs
+++ b/test/string-random-quickcheck.hs
@@ -12,7 +12,7 @@
 import Text.Regex.PCRE.Heavy (compileM, (=~))
 
 regexp :: QC.Gen Text.Text
-regexp = QC.MkGen $ \(QC.QCGen g) _ -> StringRandom.stringRandom g regregexp
+regexp = QC.MkGen $ \g _ -> StringRandom.stringRandom g regregexp
   where regregexp = "((\\w|" <> classes <> "|\\(\\w+\\))(\\{[0-4],[5-9]\\}|\\*|\\+|))*"
         classes = "\\[^?(\\w|" <> escaped <> "|a-z)+-?\\]"
         escaped = "\\\\[dDwWsSnr\\[\\]|.(){}^$-]"