diff --git a/dkist/io/asdf/converters/dataset.py b/dkist/io/asdf/converters/dataset.py
index b2f2049be..3167c1ffd 100644
--- a/dkist/io/asdf/converters/dataset.py
+++ b/dkist/io/asdf/converters/dataset.py
@@ -3,6 +3,7 @@
 
 class DatasetConverter(Converter):
     tags = [
+        "asdf://dkist.nso.edu/tags/dataset-1.2.0",
         "asdf://dkist.nso.edu/tags/dataset-1.1.0",
         "asdf://dkist.nso.edu/tags/dataset-1.0.0",
         "tag:dkist.nso.edu:dkist/dataset-0.3.0",
@@ -29,7 +30,8 @@ def from_yaml_tree(self, node, tag, ctx):
         mask = node.get("mask")
 
         # If we have a tag older than 1.2.0 then we are going to see if we can
-        # find a stokes table
+        # find a stokes table, and if we do then we are going to change it to be
+        # compatible with gWCS 0.19
         if tag_version[0] == 0 or (tag_version[0] == 1 and tag_version[1] < 2):
             # Put imports here to reduce import time on entry point load
             import numpy as np
diff --git a/dkist/io/asdf/entry_points.py b/dkist/io/asdf/entry_points.py
index 50c316a5d..f4eb87ca8 100644
--- a/dkist/io/asdf/entry_points.py
+++ b/dkist/io/asdf/entry_points.py
@@ -39,6 +39,8 @@ def get_extensions():
     dkist_converters = [FileManagerConverter(), DatasetConverter(), TiledDatasetConverter()]
     wcs_converters = [VaryingCelestialConverter(), CoupledCompoundConverter(), RavelConverter(), AsymmetricMappingConverter()]
     return [
+        ManifestExtension.from_uri("asdf://dkist.nso.edu/manifests/dkist-1.2.0",
+                                   converters=dkist_converters),
         ManifestExtension.from_uri("asdf://dkist.nso.edu/manifests/dkist-1.1.0",
                                    converters=dkist_converters),
         ManifestExtension.from_uri("asdf://dkist.nso.edu/manifests/dkist-1.0.0",
diff --git a/dkist/io/asdf/resources/manifests/dkist-1.2.0.yaml b/dkist/io/asdf/resources/manifests/dkist-1.2.0.yaml
new file mode 100644
index 000000000..d8ca36405
--- /dev/null
+++ b/dkist/io/asdf/resources/manifests/dkist-1.2.0.yaml
@@ -0,0 +1,14 @@
+%YAML 1.1
+---
+id: asdf://dkist.nso.edu/dkist/manifests/dkist-1.2.0
+extension_uri: asdf://dkist.nso.edu/dkist/extensions/dkist-1.0.0
+title: DKIST extension
+description: ASDF schemas and tags for DKIST classes.
+
+tags:
+  - schema_uri: "asdf://dkist.nso.edu/schemas/file_manager-1.0.0"
+    tag_uri: "asdf://dkist.nso.edu/tags/file_manager-1.0.0"
+  - schema_uri: "asdf://dkist.nso.edu/schemas/dataset-1.2.0"
+    tag_uri: "asdf://dkist.nso.edu/tags/dataset-1.2.0"
+  - schema_uri: "asdf://dkist.nso.edu/schemas/tiled_dataset-1.0.0"
+    tag_uri: "asdf://dkist.nso.edu/tags/tiled_dataset-1.0.0"