diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+- 0.4.3.0
+    * Add `--version` flag
+    * Bump `aeson` dependency to 1.2
+
 - 0.4.2.2
     * Bump `js-jquery` dependency to 3.2
 
diff --git a/profiteur.cabal b/profiteur.cabal
--- a/profiteur.cabal
+++ b/profiteur.cabal
@@ -1,5 +1,5 @@
 Name:                profiteur
-Version:             0.4.2.2
+Version:             0.4.3.0
 Synopsis:            Treemap visualiser for GHC prof files
 Description:         Treemap visualiser for GHC prof files
 Homepage:            http://github.com/jaspervdj/profiteur
@@ -45,7 +45,7 @@
     Profiteur.Parser
 
   Build-depends:
-    aeson                >= 0.6  && < 1.2,
+    aeson                >= 0.6  && < 1.3,
     base                 >= 4.8  && < 5,
     bytestring           >= 0.9  && < 0.11,
     containers           >= 0.5  && < 0.6,
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -12,6 +12,7 @@
 import qualified Data.Text                  as T
 import qualified Data.Text.Encoding         as T
 import qualified Data.Text.Lazy.IO          as TL
+import           Data.Version               (showVersion)
 import qualified Language.Javascript.JQuery as JQuery
 import           System.Environment         (getArgs, getProgName)
 import           System.Exit                (exitFailure)
@@ -20,7 +21,7 @@
 
 
 --------------------------------------------------------------------------------
-import           Paths_profiteur            (getDataFileName)
+import           Paths_profiteur            (getDataFileName, version)
 import           Profiteur.Core
 import           Profiteur.Parser
 
@@ -87,6 +88,8 @@
     progName <- getProgName
     args     <- getArgs
     case args of
+        _ | "--version" `elem` args ->
+            putStrLn (showVersion version)
         [profFile] -> do
             profOrErr <- decode <$> TL.readFile profFile
             case profOrErr of
@@ -95,6 +98,6 @@
                 Left err   -> do
                     putStrLn $ profFile ++ ": " ++ err
                     exitFailure
-        _          -> do
+        _ -> do
             putStrLn $ "Usage: " ++ progName ++ " <prof file>"
             exitFailure