diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # rhbzquery releases
 
+## 0.4.1 (2020-12-17)
+- set no stdout buffering (reported by @clrkwllms)
+- change license from BSD3 to GPLv2+ and add SPDX tags
+
 ## 0.4 (2020-12-11)
 - add --list-operators
 - rename longer operators to be more memorable
diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -6,6 +6,8 @@
 and if xdg-open is available will try to open the url
 (unless --dryrun is given).
 
+rhbzquery is distributed under the GPL license version 2 or later.
+
 ## Usage examples
 
 `rhbzquery f33 xyz` : F33 bugs for package xyz
diff --git a/rhbzquery.cabal b/rhbzquery.cabal
--- a/rhbzquery.cabal
+++ b/rhbzquery.cabal
@@ -1,12 +1,12 @@
 name:                rhbzquery
-version:             0.4
+version:             0.4.1
 synopsis:            Bugzilla query tool
 description:
         A CLI tool for creating bugzilla queries for bugzilla.redhat.com.
-license:             BSD3
+license:             GPL-2
 license-file:        LICENSE
-author:              Jens Petersen
-maintainer:          petersen@redhat.com
+author:              Jens Petersen <petersen@redhat.com>
+maintainer:          Jens Petersen <petersen@redhat.com>
 copyright:           2020  Jens Petersen <petersen@redhat.com>
 category:            Utils
 homepage:            https://github.com/juhp/rhbzquery
diff --git a/src/Bugzilla.hs b/src/Bugzilla.hs
--- a/src/Bugzilla.hs
+++ b/src/Bugzilla.hs
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module Bugzilla (brc)
 where
 
diff --git a/src/Common.hs b/src/Common.hs
--- a/src/Common.hs
+++ b/src/Common.hs
@@ -1,5 +1,7 @@
 {-# LANGUAGE CPP #-}
 
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module Common (error') where
 
 #if MIN_VERSION_simple_cmd(0,1,4)
diff --git a/src/Fields.hs b/src/Fields.hs
--- a/src/Fields.hs
+++ b/src/Fields.hs
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module Fields (
   allBzFields,
   BzFields(..),
diff --git a/src/Help.hs b/src/Help.hs
--- a/src/Help.hs
+++ b/src/Help.hs
@@ -1,5 +1,7 @@
 {-# LANGUAGE CPP #-}
 
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module Help (detailedHelp)
 where
 
diff --git a/src/Main.hs b/src/Main.hs
--- a/src/Main.hs
+++ b/src/Main.hs
@@ -1,6 +1,8 @@
 {-# LANGUAGE CPP #-}
 {-# LANGUAGE OverloadedStrings #-}
 
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module Main (main) where
 
 #if !MIN_VERSION_simple_cmd_args(0,1,3)
@@ -23,6 +25,7 @@
 import SimpleCmd (cmd_)
 import SimpleCmdArgs
 import System.Directory
+import System.IO
 
 import Bugzilla
 import Common
@@ -35,20 +38,22 @@
 data QueryMode = BugList | ListFields | ListOperators | CreateBug | APIQuery
 
 main :: IO ()
-main =
+main = do
+  hSetBuffering stdout NoBuffering
   simpleCmdArgsWithMods (Just version) (fullDesc <> header "Bugzilla query tool" <> progDescDoc (Just detailedHelp)) $
-  run <$>
-  switchWith 'n' "dryrun" "Do not open url" <*>
-  switchWith 'm' "mine" "My bugs" <*>
-  (flagWith' ListFields 'l' "list-fields" "List query FIELDs" <|>
-   flagWith' ListOperators 'o' "list-operators" "List op search operator types" <|>
-   flagWith' CreateBug 'f' "file" "File a bug" <|>
-   flagWith BugList APIQuery 'w' "api" "Web API query") <*>
-  many (strArg argHelp)
+    run <$>
+    switchWith 'n' "dryrun" "Do not open url" <*>
+    switchWith 'm' "mine" "My bugs" <*>
+    (flagWith' ListFields 'l' "list-fields" "List query FIELDs" <|>
+     flagWith' ListOperators 'o' "list-operators" "List op search operator types" <|>
+     flagWith' CreateBug 'f' "file" "File a bug" <|>
+     flagWith BugList APIQuery 'w' "api" "Web API query") <*>
+    many (strArg argHelp)
   where
     run :: Bool -> Bool -> QueryMode -> [String] -> IO ()
+    -- FIXME list aliases
     run _ _ ListFields _ = mapM_ putStrLn allBzFields
-    run _ _ ListOperators _ = do
+    run _ _ ListOperators _ =
       mapM_ putStrLn $ map showOpHelp operators ++
         ["", "content~ uses matches", "content!~ uses notmatches"]
     -- FIXME should really use some and many
diff --git a/src/ParseArg.hs b/src/ParseArg.hs
--- a/src/ParseArg.hs
+++ b/src/ParseArg.hs
@@ -1,3 +1,5 @@
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module ParseArg (
   argHelp,
   readBzQueryArg,
diff --git a/src/User.hs b/src/User.hs
--- a/src/User.hs
+++ b/src/User.hs
@@ -1,5 +1,7 @@
 {-# LANGUAGE CPP #-}
 
+-- SPDX-License-Identifier: GPL-2.0-or-later
+
 module User (
   getBzUser
   )