diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index 0ae0bd5..0d86bc9 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -1,3 +1,3 @@
 {
-  "crates/athena-sim": "0.13.0"
+  "crates/athena-sim": "0.13.1"
 }
diff --git a/Cargo.lock b/Cargo.lock
index 5455a3f..355ec0e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -94,7 +94,7 @@ dependencies = [
 
 [[package]]
 name = "athena-sim"
-version = "0.13.0"
+version = "0.13.1"
 dependencies = [
  "jsonschema",
  "serde",
diff --git a/crates/athena-sim/CHANGELOG.md b/crates/athena-sim/CHANGELOG.md
index ef731b3..f8ec718 100644
--- a/crates/athena-sim/CHANGELOG.md
+++ b/crates/athena-sim/CHANGELOG.md
@@ -1,5 +1,13 @@
 # Changelog
 
+## [0.13.1](https://github.com/wrightkit/athena/compare/v0.13.0...v0.13.1) (2026-11-03)
+
+
+### Bug Fixes
+
+* **sim:** leave game time unscaled under measured Set Slow Motion factors ([#139](https://github.com/wrightkit/athena/issues/139)) ([ab25e57](https://github.com/wrightkit/athena/commit/ab25e57b3a12f0321e9cb68e3b1727a037d7128b))
+* **sim:** treat Set Slow Motion as no-effect across the measured -50..200 range ([#148](https://github.com/wrightkit/athena/issues/148)) ([272df93](https://github.com/wrightkit/athena/commit/272df931186a9d864a1dc2de4b8ec85b49373c35)), closes [#143](https://github.com/wrightkit/athena/issues/143)
+
 ## [0.13.0](https://github.com/wrightkit/athena/compare/v0.12.0...v0.13.0) (2026-10-28)
 
 
diff --git a/crates/athena-sim/Cargo.toml b/crates/athena-sim/Cargo.toml
index ea8e836..6ab26a5 100644
--- a/crates/athena-sim/Cargo.toml
+++ b/crates/athena-sim/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "athena-sim"
-version = "0.13.0"
+version = "0.13.1"
 edition.workspace = true
 rust-version.workspace = true
 publish = false