diff --git a/ChangeLog.md b/ChangeLog.md
--- a/ChangeLog.md
+++ b/ChangeLog.md
@@ -1,5 +1,9 @@
 # Revision history for cl3-hmatrix-interface
 
+## 2.0.0.0  -- 2020-07-20
+
+* Update to use Cl3 version 2.0.0.0
+
 ## 1.0.0.1  -- 2018-06-20
 
 * Used Stack to verify compatibility with earlier versions of GHC and Stackage lts
diff --git a/cl3-hmatrix-interface.cabal b/cl3-hmatrix-interface.cabal
--- a/cl3-hmatrix-interface.cabal
+++ b/cl3-hmatrix-interface.cabal
@@ -10,7 +10,7 @@
 -- PVP summary:      +-+------- breaking API changes
 --                   | | +----- non-breaking API additions
 --                   | | | +--- code changes with no API change
-version:             1.0.0.1
+version:             2.0.0.0
 
 -- A short (one-line) description of the package.
 synopsis:            Interface to/from Cl3 and HMatrix.
@@ -37,7 +37,7 @@
 maintainer:          Nathan Waivio <nathan.waivio@gmail.com>
 
 -- A copyright notice.
-copyright:           Copyright (C) 2018 Nathan Waivio
+copyright:           Copyright (C) 2018-2020 Nathan Waivio
 
 category:            Math, Algebra
 
@@ -72,7 +72,7 @@
   -- Other library packages from which modules are imported.
   build-depends:       
     base >=4.7 && <5,
-    cl3 >=1.0.0.2 && <2,
+    cl3 >=1.0.0.2 && <3,
     hmatrix >=0.16 && <1
   
   -- Directories containing source files.