diff --git a/CHANGES b/CHANGES
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+0.3.25.2
+
+* Fix bug in QuarterOfYear instance
+
 0.3.25.1
 
 * Support `QuickCheck-2.14.2`
diff --git a/quickcheck-instances.cabal b/quickcheck-instances.cabal
--- a/quickcheck-instances.cabal
+++ b/quickcheck-instances.cabal
@@ -1,5 +1,5 @@
 name:               quickcheck-instances
-version:            0.3.25.1
+version:            0.3.25.2
 synopsis:           Common quickcheck instances
 description:
   QuickCheck instances.
@@ -39,7 +39,7 @@
    || ==8.4.4
    || ==8.6.5
    || ==8.8.4
-   || ==8.10.2
+   || ==8.10.3
 
 source-repository head
   type:     git
diff --git a/src/Test/QuickCheck/Instances/Time.hs b/src/Test/QuickCheck/Instances/Time.hs
--- a/src/Test/QuickCheck/Instances/Time.hs
+++ b/src/Test/QuickCheck/Instances/Time.hs
@@ -204,7 +204,7 @@
         Time.MkMonth
 
 instance Arbitrary Time.QuarterOfYear where
-    arbitrary = elements [ Time.Q1 .. Time.Q2 ]
+    arbitrary = elements [ Time.Q1 .. Time.Q4 ]
 instance CoArbitrary Time.QuarterOfYear where
     coarbitrary = coarbitrary . fromEnum
 instance Function Time.QuarterOfYear where