diff --git a/e3sm_diags/__init__.py b/e3sm_diags/__init__.py
index da601d73f..039fbedd8 100644
--- a/e3sm_diags/__init__.py
+++ b/e3sm_diags/__init__.py
@@ -1,7 +1,7 @@
 import os
 import sys
 
-__version__ = "v3.0.1"
+__version__ = "v3.1.0rc1"
 INSTALL_PATH = os.path.join(sys.prefix, "share/e3sm_diags/")
 
 # Needed for when using hdf5 >= 1.10.0,
diff --git a/tbump.toml b/tbump.toml
index 9cf5bd8b0..aa75a9a54 100644
--- a/tbump.toml
+++ b/tbump.toml
@@ -2,7 +2,7 @@
 github_url = "https://github.com/E3SM-Project/e3sm_diags"
 
 [version]
-current = "3.0.1"
+current = "3.1.0rc1"
 
 # Example of a semver regexp.
 # Make sure this matches current_version before