diff --git a/buildstockbatch/base.py b/buildstockbatch/base.py
index d9040d0e..415b48e2 100644
--- a/buildstockbatch/base.py
+++ b/buildstockbatch/base.py
@@ -38,8 +38,8 @@
 
 class BuildStockBatchBase(object):
 
-    DEFAULT_OS_VERSION = '3.2.1'
-    DEFAULT_OS_SHA = 'bdbdbc9da6'
+    DEFAULT_OS_VERSION = '3.3.0'
+    DEFAULT_OS_SHA = 'ad235ff36e'
     CONTAINER_RUNTIME = None
     LOGO = '''
      _ __         _     __,              _ __
diff --git a/docs/changelog/changelog_dev.rst b/docs/changelog/changelog_dev.rst
index 550126b8..17304cd0 100644
--- a/docs/changelog/changelog_dev.rst
+++ b/docs/changelog/changelog_dev.rst
@@ -58,3 +58,10 @@ Development Changelog
         difficult. Both spark and dask clusters were failing due to out of
         memory errors. I'm changing it back to 1GB, which will make more files,
         but each will be more manageable.
+
+    .. change::
+        :tags: general, feature
+        :pullreq: 251
+        :tickets:
+
+        For ResStock the OpenStudio version has changed to v3.3.0.