diff --git a/RELEASE_NOTES.md b/RELEASE_NOTES.md
index 88b1a17..cfc4942 100644
--- a/RELEASE_NOTES.md
+++ b/RELEASE_NOTES.md
@@ -1,5 +1,11 @@
 # Release Notes
 
+## [1.0.4]
+
+*   Better support for variable sized tensors.
+*   Support for packing/unpacking tensors that use `Any` protobuf messages.
+*   Bug fixes.
+
 ## [1.0.3]
 
 ### Added
diff --git a/dm_env_rpc/_version.py b/dm_env_rpc/_version.py
index 30eb309..01a309e 100644
--- a/dm_env_rpc/_version.py
+++ b/dm_env_rpc/_version.py
@@ -17,4 +17,4 @@
 Kept in separate file so it can be used during installation.
 """
 
-__version__ = '1.0.3'  # https://www.python.org/dev/peps/pep-0440/
+__version__ = '1.0.4'  # https://www.python.org/dev/peps/pep-0440/