diff --git a/postgrest.cabal b/postgrest.cabal
index 2936fa2df..6cf919de7 100644
--- a/postgrest.cabal
+++ b/postgrest.cabal
@@ -32,12 +32,12 @@ executable postgrest
                      , bytestring, text, split, string-conversions
                      , stringsearch
                      , containers, unordered-containers
-                     , optparse-applicative >= 0.9.1 && < 0.10
+                     , optparse-applicative == 0.11.*
                      , regex-base, regex-tdfa
                      , regex-tdfa-text
                      , Ranged-sets
                      , transformers, MissingH
-                     , bcrypt, base64-string
+                     , bcrypt >= 0.0.6, base64-string
                      , network-uri >= 2.6
                      , resource-pool
                      , blaze-builder
@@ -75,16 +75,16 @@ Test-Suite spec
                      , SpecHelper
   Build-Depends:       base, hspec >= 2.1.2, QuickCheck
                      , hspec-wai >= 0.5.0, hspec-wai-json
-                     , hasql == 0.7.*, hasql-backend
-                     , hasql-postgres == 0.10.*
-                     , warp >= 3.0.2, wai >= 3.0.1
+                     , hasql, hasql-backend
+                     , hasql-postgres
+                     , warp, wai
                      , packdeps, hlint
                      , HTTP, convertible
                      , case-insensitive
                      , wai-extra, wai-cors, containers
-                     , wai-middleware-static >= 0.6.0
+                     , wai-middleware-static
                      , http-types, scientific, time
-                     , bytestring, aeson, network >= 2.6
+                     , bytestring, aeson, network
                      , text, optparse-applicative
                      , stringsearch
                      , unordered-containers
@@ -95,7 +95,7 @@ Test-Suite spec
                      , Ranged-sets
                      , transformers, MissingH, split
                      , bcrypt, base64-string
-                     , network-uri >= 2.6
+                     , network-uri
                      , resource-pool
                      , blaze-builder
                      , vector
diff --git a/src/Config.hs b/src/Config.hs
index 1f468a910..84b1c6f78 100644
--- a/src/Config.hs
+++ b/src/Config.hs
@@ -24,16 +24,16 @@ data AppConfig = AppConfig {
 
 argParser :: Parser AppConfig
 argParser = AppConfig
-  <$> strOption (long "db-name" <> short 'd'                     <> help "name of database")
-  <*> option    (long "db-port" <> short 'P' <> value 5432        <> help "postgres server port")
-  <*> strOption (long "db-user" <> short 'U'                     <> help "postgres authenticator role")
-  <*> strOption (long "db-pass"             <> value ""          <> help "password for authenticator role")
-  <*> strOption (long "db-host" <> short 'h' <> value "localhost" <> help "postgres server hostname")
+  <$> strOption (long "db-name" <> short 'd' <> metavar "NAME" <> help "name of database")
+  <*> option auto (long "db-port" <> short 'P' <> metavar "PORT" <> value 5432 <> help "postgres server port" <> showDefault)
+  <*> strOption (long "db-user" <> short 'U' <> metavar "ROLE" <> help "postgres authenticator role")
+  <*> strOption (long "db-pass" <> metavar "PASS" <> value "" <> help "password for authenticator role")
+  <*> strOption (long "db-host" <> metavar "HOST" <> value "localhost" <> help "postgres server hostname" <> showDefault)
 
-  <*> option    (long "port" <> short 'p' <> value 3000 <> help "port number on which to run HTTP server")
-  <*> strOption (long "anonymous" <> short 'a' <> help "postgres role to use for non-authenticated requests")
-  <*> switch    (long "secure" <> short 's' <> help "Redirect all requests to HTTPS")
-  <*> option    (long "db-pool" <> value 10 <> help "Max connections in database pool")
+  <*> option auto (long "port" <> short 'p' <> metavar "PORT" <> value 3000 <> help "port number on which to run HTTP server" <> showDefault)
+  <*> strOption (long "anonymous" <> short 'a' <> metavar "ROLE" <> help "postgres role to use for non-authenticated requests")
+  <*> switch (long "secure" <> short 's' <> help "Redirect all requests to HTTPS")
+  <*> option auto (long "db-pool" <> metavar "COUNT" <> value 10 <> help "Max connections in database pool" <> showDefault)
 
 defaultCorsPolicy :: CorsResourcePolicy
 defaultCorsPolicy =  CorsResourcePolicy Nothing
diff --git a/src/Main.hs b/src/Main.hs
index 7f58e0cf9..ca0739499 100644
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -24,7 +24,14 @@ import Config (AppConfig(..), argParser, corsPolicy)
 
 main :: IO ()
 main = do
-  conf <- execParser (info (helper <*> argParser) describe)
+  let opts = info (helper <*> argParser) $
+                fullDesc
+                <> progDesc (
+                    "PostgREST "
+                    <> prettyVersion
+                    <> " / create a REST API to an existing Postgres database"
+                )
+  conf <- execParser opts
   let port = configPort conf
 
   unless (configSecure conf) $
@@ -59,5 +66,4 @@ main = do
     either (respond . errResponse) respond resOrError
 
   where
-    describe = progDesc "create a REST API to an existing Postgres database"
     prettyVersion = intercalate "." $ map show $ versionBranch version