diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 969d3dbf..3f5ba0b2 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  ".": "2.1.0"
+  ".": "2.0.0a2"
 }
diff --git a/CHANGELOG.md b/CHANGELOG.md
index dcc6dfa3..2afe75c4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,6 @@
 # Changelog
 
-## [2.1.0](https://github.com/MilesCranmer/PySR/compare/v2.0.0...v2.1.0) (2026-04-19)
+## [2.0.0a2](https://github.com/MilesCranmer/PySR/compare/v2.0.0a1...v2.0.0a2) (2026-04-19)
 
 
 ### Features
diff --git a/pyproject.toml b/pyproject.toml
index 6402a44c..6991d325 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "pysr"
-version = "2.1.0"
+version = "2.0.0a2"
 authors = [
     {name = "Miles Cranmer", email = "miles.cranmer@gmail.com"},
 ]