diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,6 +1,7 @@
 # Changelog for som
 
-10.0.2 Fixed a warning.
+10.1.2 Fixed a warning.
+10.1.1 Fixed a warning.
        Added more documentation.
 10.0.1 Upgraded to Stackage lts-12.16.
 10.0.0 Revamped to work with Stack v1.7.1.
diff --git a/som.cabal b/som.cabal
--- a/som.cabal
+++ b/som.cabal
@@ -2,10 +2,10 @@
 --
 -- see: https://github.com/sol/hpack
 --
--- hash: 5821eed6b940eb4034165c9ddfccc442441bba7ee1f8f61c9d11022f811eba6d
+-- hash: a3aa4f1cafee447c60a82975496ad7f90007d0fab9af1ac9d17e3e4f32324370
 
 name:           som
-version:        10.1.1
+version:        10.1.2
 synopsis:       Self-Organising Maps
 description:    Please see the README on GitHub at <https://github.com/mhwombat/som#readme>
 category:       Math
diff --git a/src/Data/Datamining/Clustering/SGM2Internal.hs b/src/Data/Datamining/Clustering/SGM2Internal.hs
--- a/src/Data/Datamining/Clustering/SGM2Internal.hs
+++ b/src/Data/Datamining/Clustering/SGM2Internal.hs
@@ -12,7 +12,8 @@
 --
 ------------------------------------------------------------------------
 {-# LANGUAGE TypeFamilies, FlexibleContexts, FlexibleInstances,
-    MultiParamTypeClasses, DeriveAnyClass, DeriveGeneric #-}
+    MultiParamTypeClasses, DeriveAnyClass, DeriveGeneric,
+    UndecidableInstances #-}
 
 module Data.Datamining.Clustering.SGM2Internal where
 
diff --git a/src/Data/Datamining/Clustering/SGMInternal.hs b/src/Data/Datamining/Clustering/SGMInternal.hs
--- a/src/Data/Datamining/Clustering/SGMInternal.hs
+++ b/src/Data/Datamining/Clustering/SGMInternal.hs
@@ -12,7 +12,8 @@
 --
 ------------------------------------------------------------------------
 {-# LANGUAGE TypeFamilies, FlexibleContexts, FlexibleInstances,
-    MultiParamTypeClasses, DeriveAnyClass, DeriveGeneric #-}
+    MultiParamTypeClasses, DeriveAnyClass, DeriveGeneric,
+    UndecidableInstances #-}
 
 module Data.Datamining.Clustering.SGMInternal where
 
diff --git a/src/Data/Datamining/Clustering/SOMInternal.hs b/src/Data/Datamining/Clustering/SOMInternal.hs
--- a/src/Data/Datamining/Clustering/SOMInternal.hs
+++ b/src/Data/Datamining/Clustering/SOMInternal.hs
@@ -12,7 +12,8 @@
 --
 ------------------------------------------------------------------------
 {-# LANGUAGE TypeFamilies, FlexibleContexts, FlexibleInstances,
-    MultiParamTypeClasses, DeriveAnyClass, DeriveGeneric #-}
+    MultiParamTypeClasses, DeriveAnyClass, DeriveGeneric,
+    UndecidableInstances #-}
 
 module Data.Datamining.Clustering.SOMInternal where