diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,15 @@
 # Revision history for krank
 
+## 0.2.2 -- 2020-06-30
+
+* #84 fix build with `unordered-containers` 0.2.11.0
+* #81, new `--version` command line argument
+
+## 0.2.1 -- 2020-05-02
+
+* #76 fix. ignore space in URL
+* Output now includes the issue title.
+
 ## 0.2.0 -- 2020-04-19
 
 * GHC 8.10 support
diff --git a/app/Main.hs b/app/Main.hs
--- a/app/Main.hs
+++ b/app/Main.hs
@@ -14,6 +14,7 @@
 import System.Console.Pretty (supportsPretty)
 import System.Exit (exitFailure)
 import Text.Regex.PCRE.Heavy
+import Version (displayVersion)
 
 data KrankOpts
   = KrankOpts
@@ -58,6 +59,14 @@
           <> Opt.help "Disable colored outputs"
       )
 
+versionParse :: Opt.Parser (a -> a)
+versionParse =
+  Opt.infoOption
+    displayVersion
+    ( Opt.long "version"
+        <> Opt.help "Displays the version of the program"
+    )
+
 optionsParser :: Opt.Parser KrankOpts
 optionsParser =
   KrankOpts
@@ -75,7 +84,7 @@
 opts :: Opt.ParserInfo KrankOpts
 opts =
   Opt.info
-    (optionsParser <**> Opt.helper)
+    (optionsParser <**> Opt.helper <**> versionParse)
     ( Opt.fullDesc
         <> Opt.progDesc "Checks the comments in FILES"
         <> Opt.header "krank - a comment linter / analytics tool"
@@ -84,7 +93,7 @@
 main :: IO ()
 main = do
   canUseColor <- supportsPretty
-  config <- Opt.execParser opts
+  config <- Opt.customExecParser (Opt.prefs Opt.showHelpOnError) opts
   let kConfig =
         (krankConfig config)
           { useColors = useColors (krankConfig config) && canUseColor
diff --git a/krank.cabal b/krank.cabal
--- a/krank.cabal
+++ b/krank.cabal
@@ -1,6 +1,6 @@
 cabal-version:       2.2
 name:                krank
-version:             0.2.1
+version:             0.2.2
 synopsis: Krank checks your code source comments for important markers
 -- description:
 bug-reports: https://github.com/guibou/krank/issues
@@ -38,6 +38,7 @@
 
 library
   import: shared-library
+  autogen-modules:     Paths_krank
   exposed-modules:     Krank
                        Krank.Checkers.Ignore
                        Krank.Checkers.IssueTracker
@@ -47,6 +48,8 @@
                        Utils.Github
                        Utils.Gitlab
                        Utils.Req
+                       Version
+  other-modules:       Paths_krank
 
 test-suite krank-test
   import: shared-library
diff --git a/src/Krank/Checkers/Ignore.hs b/src/Krank/Checkers/Ignore.hs
--- a/src/Krank/Checkers/Ignore.hs
+++ b/src/Krank/Checkers/Ignore.hs
@@ -9,7 +9,7 @@
 
 import qualified Data.ByteString.Char8 as ByteString
 import Data.ByteString.Char8 (ByteString)
-import Data.HashMap.Strict as HashM
+import qualified Data.HashMap.Strict as HashM
 import qualified Data.List as DataL
 import Krank.Types
 import PyF (fmt)
diff --git a/src/Version.hs b/src/Version.hs
new file mode 100644
--- /dev/null
+++ b/src/Version.hs
@@ -0,0 +1,16 @@
+{-# LANGUAGE QuasiQuotes #-}
+
+module Version
+  ( displayVersion,
+  )
+where
+
+import Data.Version (showVersion)
+import Paths_krank (version)
+import PyF (fmt)
+
+getVersion :: String
+getVersion = showVersion version
+
+displayVersion :: String
+displayVersion = [fmt|Krank {getVersion}|]