diff --git a/README.md b/README.md
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@
 **Running** this example causes this output:
 (_not entirely true because of async logging, but true enough_)
 
-```text
+```
 2018-11-05T10:50:42 DEBUG     scheduler loop entered                                                   ForkIOScheduler.hs line 131
 2018-11-05T10:50:42 DEBUG            !1 [ThreadId 11] enter process                                                            ForkIOScheduler.hs line 437
 2018-11-05T10:50:42 NOTICE           !1 [ThreadId 11] ++++++++ main process started ++++++++                                   ForkIOScheduler.hs line 394
diff --git a/extensible-effects-concurrent.cabal b/extensible-effects-concurrent.cabal
--- a/extensible-effects-concurrent.cabal
+++ b/extensible-effects-concurrent.cabal
@@ -1,12 +1,13 @@
 name:           extensible-effects-concurrent
-version:        0.9.2
+version:        0.9.2.1
 description:    Please see the README on GitHub at <https://github.com/sheyll/extensible-effects-concurrent#readme>
 synopsis:       Message passing concurrency as extensible-effect
 homepage:       https://github.com/sheyll/extensible-effects-concurrent#readme
 bug-reports:    https://github.com/sheyll/extensible-effects-concurrent/issues
 author:         Sven Heyll
 maintainer:     sven.heyll@gmail.com
-category:       Concurrency
+category:       Concurrency, Control, Effect
+tested-with:    GHC==8.4.3, GHC==8.4.4
 copyright:      Copyright Sven Heyll
 license:        BSD3
 license-file:   LICENSE