diff --git a/ghc-hashtables.changes b/ghc-hashtables.changes
index cbedbfe..5f39964 100644
--- a/ghc-hashtables.changes
+++ b/ghc-hashtables.changes
@@ -1,3 +1,12 @@
+-------------------------------------------------------------------
+Tue Sep  8 02:00:37 UTC 2020 - psimons@suse.com
+
+- Update hashtables to version 1.2.4.0.
+  ## 1.2.4.0
+
+  Fix a [correctness bug](https://github.com/gregorycollins/hashtables/issues/55)
+  with cuckoo hash tables and the new `mutate` function introduced in 1.2.3.0.
+
 -------------------------------------------------------------------
 Tue Aug 18 10:44:58 UTC 2020 - Peter Simons <psimons@suse.com>
 
diff --git a/ghc-hashtables.spec b/ghc-hashtables.spec
index e54afe1..3171345 100644
--- a/ghc-hashtables.spec
+++ b/ghc-hashtables.spec
@@ -17,8 +17,9 @@
 
 
 %global pkg_name hashtables
+%bcond_with tests
 Name:           ghc-%{pkg_name}
-Version:        1.2.3.4
+Version:        1.2.4.0
 Release:        0
 Summary:        Mutable hash tables in the ST monad
 License:        BSD-3-Clause
@@ -29,6 +30,14 @@ BuildRequires:  ghc-hashable-devel
 BuildRequires:  ghc-primitive-devel
 BuildRequires:  ghc-rpm-macros
 BuildRequires:  ghc-vector-devel
+%if %{with tests}
+BuildRequires:  ghc-HUnit-devel
+BuildRequires:  ghc-QuickCheck-devel
+BuildRequires:  ghc-mwc-random-devel
+BuildRequires:  ghc-test-framework-devel
+BuildRequires:  ghc-test-framework-hunit-devel
+BuildRequires:  ghc-test-framework-quickcheck2-devel
+%endif
 
 %description
 This package provides a couple of different implementations of mutable hash
@@ -123,6 +132,9 @@ This package provides the Haskell %{pkg_name} library development files.
 %install
 %ghc_lib_install
 
+%check
+%cabal_test
+
 %post devel
 %ghc_pkg_recache
 
diff --git a/hashtables-1.2.3.4.tar.gz b/hashtables-1.2.3.4.tar.gz
deleted file mode 100644
index f728834..0000000
--- a/hashtables-1.2.3.4.tar.gz
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:125ce62701fba3f666609f5c75f452005aa5d32dff4eeee3f3903c30b2ed55e6
-size 58458
diff --git a/hashtables-1.2.4.0.tar.gz b/hashtables-1.2.4.0.tar.gz
new file mode 100644
index 0000000..b97e4eb
--- /dev/null
+++ b/hashtables-1.2.4.0.tar.gz
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:787ff5a24e184467b2b6d1fa5d34d5ffb548d45c8b3c644ed1dfdd9368c5a75e
+size 58393