diff --git a/DESCRIPTION b/DESCRIPTION
index d9a0014c..46757611 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,6 +1,6 @@
 Package: MSnbase
 Title: Base Functions and Classes for Mass Spectrometry and Proteomics
-Version: 2.33.1
+Version: 2.33.2
 Description: MSnbase provides infrastructure for manipulation,
              processing and visualisation of mass spectrometry and
              proteomics data, ranging from raw to quantitative and
diff --git a/NEWS.md b/NEWS.md
index 4298fdb3..7dc4a9f3 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,5 +1,10 @@
 # MSnbase 2.33
 
+## MSnbase 2.33.2
+
+- Fix the `pheplus1` code chunk in MSnbase-demo vignette to handle the
+  new `Rdispo::getIsotope()` list return value.
+
 ## MSnbase 2.33.1
 
 - Add functionality to convert a `Spectra` object to a `MSpectra`.
diff --git a/vignettes/v01-MSnbase-demo.Rmd b/vignettes/v01-MSnbase-demo.Rmd
index 9ae4c6e9..529ddf88 100644
--- a/vignettes/v01-MSnbase-demo.Rmd
+++ b/vignettes/v01-MSnbase-demo.Rmd
@@ -1062,7 +1062,7 @@ library(Rdisop)
 Fim <- getMolecule("C8H10N")
 getMass(Fim)
 isotopes <- getIsotope(Fim)
-F1 <- isotopes[2, 2]
+F1 <- isotopes[[1]][2, 2]
 F1
 ```