diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,6 +5,11 @@
 ## Unreleased changes
 
 
+## 0.2.0.1
+
+-   Compilation and tooling with GHC 9.2.3.
+
+
 ## 0.2.0.0
 
 -   Rename `rescaleWith` to `rescaleSWith` to indicate the rescaling of
diff --git a/LICENSE b/LICENSE
--- a/LICENSE
+++ b/LICENSE
@@ -652,7 +652,7 @@
   If the program does terminal interaction, make it output a short
 notice like this when it starts in an interactive mode:
 
-    <program>  Copyright (C) 2021  Dominik Schrempf
+    <program>  Copyright 2021  Dominik Schrempf
     This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
     This is free software, and you are welcome to redistribute it
     under certain conditions; type `show c' for details.
diff --git a/covariance.cabal b/covariance.cabal
--- a/covariance.cabal
+++ b/covariance.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               covariance
-version:            0.2.0.0
+version:            0.2.0.1
 synopsis:
     Well-conditioned estimation of large-dimensional covariance matrices
 
diff --git a/src/Statistics/Covariance.hs b/src/Statistics/Covariance.hs
--- a/src/Statistics/Covariance.hs
+++ b/src/Statistics/Covariance.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance
 -- Description :  Estimate covariance matrices from sample data
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/src/Statistics/Covariance/GraphicalLasso.hs b/src/Statistics/Covariance/GraphicalLasso.hs
--- a/src/Statistics/Covariance/GraphicalLasso.hs
+++ b/src/Statistics/Covariance/GraphicalLasso.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance.GraphicalLasso
 -- Description :  Graphical lasso
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/src/Statistics/Covariance/Internal/Tools.hs b/src/Statistics/Covariance/Internal/Tools.hs
--- a/src/Statistics/Covariance/Internal/Tools.hs
+++ b/src/Statistics/Covariance/Internal/Tools.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance.Internal.Tools
 -- Description :  Common functions
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/src/Statistics/Covariance/LedoitWolf.hs b/src/Statistics/Covariance/LedoitWolf.hs
--- a/src/Statistics/Covariance/LedoitWolf.hs
+++ b/src/Statistics/Covariance/LedoitWolf.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance.LedoitWolf
 -- Description :  Shrinkage based covariance estimator by Ledoit and Wolf
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/src/Statistics/Covariance/OracleApproximatingShrinkage.hs b/src/Statistics/Covariance/OracleApproximatingShrinkage.hs
--- a/src/Statistics/Covariance/OracleApproximatingShrinkage.hs
+++ b/src/Statistics/Covariance/OracleApproximatingShrinkage.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance.OracleApproximatingShrinkage
 -- Description :  Iterative shrinkage based covariance estimator
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/src/Statistics/Covariance/RaoBlackwellLedoitWolf.hs b/src/Statistics/Covariance/RaoBlackwellLedoitWolf.hs
--- a/src/Statistics/Covariance/RaoBlackwellLedoitWolf.hs
+++ b/src/Statistics/Covariance/RaoBlackwellLedoitWolf.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance.RaoBlackwellLedoitWolf
 -- Description :  Improved shrinkage based covariance estimator
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/src/Statistics/Covariance/Types.hs b/src/Statistics/Covariance/Types.hs
--- a/src/Statistics/Covariance/Types.hs
+++ b/src/Statistics/Covariance/Types.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Statistics.Covariance.Types
 -- Description :  Common types
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com
diff --git a/test/Test.hs b/test/Test.hs
--- a/test/Test.hs
+++ b/test/Test.hs
@@ -1,7 +1,7 @@
 -- |
 -- Module      :  Spec
 -- Description :  Covariance test suite
--- Copyright   :  (c) 2021 Dominik Schrempf
+-- Copyright   :  2021 Dominik Schrempf
 -- License     :  GPL-3.0-or-later
 --
 -- Maintainer  :  dominik.schrempf@gmail.com