diff --git a/mcmc.cabal b/mcmc.cabal
--- a/mcmc.cabal
+++ b/mcmc.cabal
@@ -1,6 +1,6 @@
 cabal-version:      3.0
 name:               mcmc
-version:            0.6.2.2
+version:            0.6.2.3
 synopsis:           Sample from a posterior using Markov chain Monte Carlo
 description:
   Please see the README on GitHub at <https://github.com/dschrempf/mcmc#readme>
diff --git a/src/Mcmc/Proposal/Hamiltonian.hs b/src/Mcmc/Proposal/Hamiltonian.hs
--- a/src/Mcmc/Proposal/Hamiltonian.hs
+++ b/src/Mcmc/Proposal/Hamiltonian.hs
@@ -563,7 +563,7 @@
     (_, ss, xsNormalized) = S.scale xs'
     -- sigmaNormalized = L.unSym $ either error id $ S.oracleApproximatingShrinkage xsNormalized
     sigmaNormalized = L.unSym $ either error fst $ S.graphicalLasso 0.5 xsNormalized
-    sigma = S.rescaleWith ss sigmaNormalized
+    sigma = S.rescaleSWith ss sigmaNormalized
     massesNew = L.inv sigma
 
 -- | Hamiltonian Monte Carlo proposal.