diff --git a/CHANGELOG b/CHANGELOG
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,9 @@
+2022-10-21 Ivan Perez <ivan.perez@keera.co.uk>
+        * Version bump (0.9.1) (#335).
+        * Add link to updated paper examples from README (#319).
+        * Update Travis script (#333).
+        * Style fixes (partial) (#334).
+
 2022-08-21 Ivan Perez <ivan.perez@keera.co.uk>
         * Version bump (0.9.0) (#313).
         * Document haskell-titan support in readme (#176).
diff --git a/dunai.cabal b/dunai.cabal
--- a/dunai.cabal
+++ b/dunai.cabal
@@ -30,7 +30,7 @@
 build-type:    Simple
 
 name:          dunai
-version:       0.9.0
+version:       0.9.1
 author:        Ivan Perez, Manuel Bärenz
 maintainer:    ivan.perez@keera.co.uk
 homepage:      https://github.com/ivanperez-keera/dunai
diff --git a/src/Data/MonadicStreamFunction/Instances/VectorSpace.hs b/src/Data/MonadicStreamFunction/Instances/VectorSpace.hs
--- a/src/Data/MonadicStreamFunction/Instances/VectorSpace.hs
+++ b/src/Data/MonadicStreamFunction/Instances/VectorSpace.hs
@@ -45,7 +45,7 @@
 -- | Vector-space instance for 'MSF's.
 instance (Monad m, VectorSpace v s) => VectorSpace (MSF m a v) s where
   zeroVector   = constantly zeroVector
-  r   *^ msf   = msf >>^ (r *^)
+  r *^ msf     = msf >>^ (r *^)
   msf ^/ r     = msf >>^ (^/ r)
   (^+^)        = elementwise2 (^+^)
   (^-^)        = elementwise2 (^-^)