diff --git a/CHANGES b/CHANGES
--- a/CHANGES
+++ b/CHANGES
@@ -134,3 +134,6 @@
 
 0.2.3.7:
 		* implement vector functions thanks to alang9 on github
+
+0.2.3.8:
+		* resolve ambiguity in Upper and Lower types from HMatrix
diff --git a/lib/Graphics/Rendering/Plot/Render/Plot/Data.hs b/lib/Graphics/Rendering/Plot/Render/Plot/Data.hs
--- a/lib/Graphics/Rendering/Plot/Render/Plot/Data.hs
+++ b/lib/Graphics/Rendering/Plot/Render/Plot/Data.hs
@@ -29,7 +29,7 @@
 --import Foreign.Storable 
 --import Foreign.Ptr
 
-import Numeric.LinearAlgebra
+import Numeric.LinearAlgebra hiding (Upper, Lower)
 --import Numeric.LinearAlgebra.Data
 import Numeric.LinearAlgebra.Devel
 
diff --git a/plot.cabal b/plot.cabal
--- a/plot.cabal
+++ b/plot.cabal
@@ -1,5 +1,5 @@
 Name:                plot
-Version:             0.2.3.7
+Version:             0.2.3.8
 License:             BSD3
 License-file:        LICENSE
 Copyright:           (c) A.V.H. McPhail 2010, 2012, 2013, 2014, 2015, 2016, 2017