diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,8 @@
+Version 1.2.5.1
+---------------
+
+* Bumped the `containers` dependency upper bound
+
 Version 1.2.5
 ---------------
 
diff --git a/monoid-subclasses.cabal b/monoid-subclasses.cabal
--- a/monoid-subclasses.cabal
+++ b/monoid-subclasses.cabal
@@ -1,5 +1,5 @@
 Name:                monoid-subclasses
-Version:             1.2.5
+Version:             1.2.5.1
 Cabal-Version:       >= 1.10
 Build-Type:          Simple
 Synopsis:            Subclasses of Monoid
@@ -42,7 +42,7 @@
                    , Data.Semigroup.Factorial
   Build-Depends:     base >= 4.9 && < 5,
                      bytestring >= 0.9 && < 1.0,
-                     containers >= 0.5.7.0 && < 0.7,
+                     containers >= 0.5.7.0 && < 0.8,
                      text >= 0.11 && < 1.3 || >= 2.0 && < 2.2,
                      primes == 0.2.*,
                      vector >= 0.12 && < 0.14,