diff --git a/build.gradle b/build.gradle
index 7dc36f8bc4..6144a798a0 100644
--- a/build.gradle
+++ b/build.gradle
@@ -29,7 +29,7 @@ allprojects {
   // We try to follow semantic versioning, and thus we use <major>.<minor>.<patch>-<prerelease version>
   // <prerelease version> may be SNAPSHOT, alphax, betax, etc.
   // Note - if bumping to a new major or minor version, be sure to update the docs
-  version = '5.9.1-SNAPSHOT'
+  version = '5.9.2-SNAPSHOT'
   status = 'development'
   //status= 'release'
 }
diff --git a/docs/src/site/pages/netcdfJava/Upgrade.md b/docs/src/site/pages/netcdfJava/Upgrade.md
index d26474e7d9..2cb1aac1b6 100644
--- a/docs/src/site/pages/netcdfJava/Upgrade.md
+++ b/docs/src/site/pages/netcdfJava/Upgrade.md
@@ -36,9 +36,12 @@ As such, we no longer utilize WebStart.
 
 Point release notes:
 * [5.9.0](https://github.com/Unidata/netcdf-java/releases/tag/v5.9.0){:target="_blank"} (_2025-08-08_)
+* [5.9.1](https://github.com/Unidata/netcdf-java/releases/tag/v5.9.1){:target="_blank"} (_2025-09-09_)
 
 The 5.9.x includes bug fixes around zarr support, scaling of projection parameters, and setting of the library path for the netCDF-C library.
 Additionally, udunits grammar code is now generated at build time, HTTP errors when disambiguating http/https locations has been improved, and scanning for filter providers is done once during initialization.
+EnhancementProviders are now loaded upon VariableDS instantiation, fixing a critical multithreaded environment related bug.
+Several ToolsUI improvements have been made as well.
 Finally, several third party libraries have been upgraded.
 Please see the release notes on GitHub for more details on additions, enhancements, and bug fixes.