diff --git a/repos.bzl b/repos.bzl
index e218557..464c864 100644
--- a/repos.bzl
+++ b/repos.bzl
@@ -22,7 +22,7 @@
     if not native.existing_rule("com_google_mpact-sim"):
         http_archive(
             name = "com_google_mpact-sim",
-            sha256 = "540d8d8c1aa7b895c56c0e7ff2fc15c9b6c0e0c7d938f2ba83f5394170400285",
-            strip_prefix = "mpact-sim-d10615bde3794f0b25a5d34dd38e0a9ebc6bf9ac",
-            url = "https://github.com/google/mpact-sim/archive/d10615bde3794f0b25a5d34dd38e0a9ebc6bf9ac.tar.gz",
+            sha256 = "5ac4dfc3f7d3dcc5811ebf35a92d9f244d6e095d16d5f032d7a118a890844992",
+            strip_prefix = "mpact-sim-b418214ff643468873057f8cade340b93dd2b9f5",
+            url = "https://github.com/google/mpact-sim/archive/b418214ff643468873057f8cade340b93dd2b9f5.tar.gz",
         )