diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Changelog for extensible-effects-concurrent
 
+## 0.6.2
+
+- Fix bad `containers` version boundary
+
 ## 0.6.1
 
 - Improve Experimental Nix Expressions
diff --git a/extensible-effects-concurrent.cabal b/extensible-effects-concurrent.cabal
--- a/extensible-effects-concurrent.cabal
+++ b/extensible-effects-concurrent.cabal
@@ -1,5 +1,5 @@
 name:           extensible-effects-concurrent
-version:        0.6.1
+version:        0.6.2
 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
@@ -40,7 +40,7 @@
       filepath,
       time,
       mtl,
-      containers,
+      containers >=0.5.8 && <0.7,
       QuickCheck <2.12,
       lens,
       logging-effect,