diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -1,4 +1,4 @@
-Copyright (c) 2012--2015, Anders Claesson
+Copyright (c) 2012--2016, Anders Claesson
 
 All rights reserved.
 
diff --git a/Sloane/Options.hs b/Sloane/Options.hs
--- a/Sloane/Options.hs
+++ b/Sloane/Options.hs
@@ -10,6 +10,7 @@
     , getOptions
     ) where
 
+import Data.Monoid
 import Options.Applicative
 
 -- | Command line options:
diff --git a/sloane.1 b/sloane.1
--- a/sloane.1
+++ b/sloane.1
@@ -1,6 +1,6 @@
-.\" Automatically generated by Pandoc 1.16.0.2
+.\" Automatically generated by Pandoc 1.19.2.1
 .\"
-.TH "SLOANE" "1" "22 March 2016" "User Manual" "Version 5.0.0"
+.TH "SLOANE" "1" "27 March 2016" "User Manual" "Version 5.0.1"
 .hy
 .SH NAME
 .PP
@@ -88,6 +88,13 @@
 .TP
 .B \-\-all
 Fetch all matching entries (equivalent to \-n 999999).
+.RS
+.RE
+.TP
+.B \-\-filter
+Filter out those sequences from standard input that are in the local
+database.
+The input is expected to be in the form returned by \f[B]hops\f[](1).
 .RS
 .RE
 .TP
diff --git a/sloane.cabal b/sloane.cabal
--- a/sloane.cabal
+++ b/sloane.cabal
@@ -1,5 +1,5 @@
 Name:                sloane
-Version:             5.0.0
+Version:             5.0.1
 Synopsis:            A command line interface to Sloane's OEIS.
 
 Description:         A command line interface to Sloane's On-Line Encyclopedia of
@@ -15,6 +15,7 @@
 Extra-Source-Files:  README.md sloane.1
 
 Cabal-version:       >=1.9.2
+Tested-With:         GHC == 8.0.2
 
 source-repository head
   type:                git
@@ -37,7 +38,7 @@
   Build-depends:       aeson >=0.8,
                        ansi-terminal >=0.6,
                        attoparsec >=0.11,
-                       base >=4 && <5,
+                       base >=4.8 && <5,
                        bloomfilter >=2.0,
                        bytestring >=0.10,
                        conduit >=1,
diff --git a/sloane.hs b/sloane.hs
--- a/sloane.hs
+++ b/sloane.hs
@@ -19,7 +19,6 @@
 import qualified Data.Map as M
 import qualified Data.ByteString.Char8 as B
 import qualified Data.ByteString.Lazy.Char8 as BL
-import Control.Applicative
 import System.Directory
 import System.IO
 import Sloane.OEIS
@@ -31,7 +30,7 @@
 import Sloane.DB
 
 versionString :: String
-versionString = "5.0.0"
+versionString = "5.0.1"
 
 oeisURL :: URL
 oeisURL = "https://oeis.org/search"