diff --git a/cosmo-bootstrap/Dockerfile b/cosmo-bootstrap/Dockerfile
index 6ebf84b..5d796fd 100644
--- a/cosmo-bootstrap/Dockerfile
+++ b/cosmo-bootstrap/Dockerfile
@@ -1,8 +1,15 @@
 # MAIN: https://justine.lol/cosmopolitan/
 # REPO: https://github.com/jart/cosmopolitan
 ARG COSMO_FLAVOR=def
-ARG COSMO_COMMIT=1c2da3a55a6af892bc9c5036c03da403952983fe
-ARG COSMO_SHA256=87f49dc098fe9fd25f55a94198d247be8bce50c5b1ef3bd5432ff53fe492ad04
+# latest:
+ARG COSMO_COMMIT=b31ba86ace4fe8605bb0fa06fbfd5b7781ca6f88
+ARG COSMO_SHA256=6f76399bee88985c081a3324687adb181a611e30e13b68aa86bc1e91232763be
+# last working:
+# ARG COSMO_COMMIT=f7bccf55135a7459e6c3d088a3be6b05c2856903
+# ARG COSMO_SHA256=12562aa790178ea0e0e9f15cf190c3afa6ad65b31a5b20f7ec7d76dfb77aa3cf
+# first broken:
+# ARG COSMO_COMMIT=d5b8b644c27fa7c05618ffb4072b1f35849ba527
+# ARG COSMO_SHA256=e4ccf57cf0312db6e3b93dd65b9026ecc991868a5c9b8f6254c464b4d96adf52
 ARG COSMO_REBUILD=0
 
 FROM localhost/notwa-util AS downloader