diff --git a/NEWS.md b/NEWS.md
index 98d355f..f79be05 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -1,3 +1,10 @@
+# NEONiso 0.5.1
+
+* This update takes advantage of upgrades to the stackEddy function 
+in neonUtilities 2.1.1, which allows the calibration routines to run
+more efficiently on NEON's HDF5 files. For example, calibrate_carbon(),
+runs ~2x faster if neonUtilities 2.1.1 is used instead of earlier versions.
+
 # NEONiso 0.5.0
 
 * Adds the calibrate_carbon() function, which can be used to generate
diff --git a/cran-comments.md b/cran-comments.md
index 33bb376..88aa2ad 100644
--- a/cran-comments.md
+++ b/cran-comments.md
@@ -12,6 +12,7 @@ No errors, warnings, or notes on local environment, GitHub Actions, or win-build
 
 * Auto-check will issue a warning about misspelled words in DESCRIPTION, but the words flagged are all correct.
 * r-hub test environments fail due to issues building Bioconductor packages (rhdf5).
+* CRAN web checks also occassionaly issue an error due to issues with rhdf5.
 
 ## Downstream dependencies
 There are currently no downstream dependencies for this package.