diff --git a/cosmo/Dockerfile b/cosmo/Dockerfile
index d81822a..35ad1a9 100644
--- a/cosmo/Dockerfile
+++ b/cosmo/Dockerfile
@@ -1,8 +1,8 @@
 # MAIN: https://justine.lol/cosmopolitan/
 # REPO: https://github.com/jart/cosmopolitan
 ARG COSMO_FLAVOR=def
-ARG COSMO_COMMIT=d38700687a1c39e12f45064a79fe0b10d2af8b5f
-ARG COSMO_SHA256=a0a17cd43b0288313a1b9d3cedce2932e318260e44def70e79aeadde97106d01
+ARG COSMO_COMMIT=997ce29ddc65dc3233f13444ddc49dbcded55980
+ARG COSMO_SHA256=3519ccb0a6d6984775e837d4776d5f83e2b4886fc49daf8e267be55b1e681c88
 
 FROM localhost/notwa-util AS downloader
 ARG COSMO_COMMIT COSMO_SHA256
@@ -101,9 +101,9 @@ RUN : \
  && ./expand tar zcf dist/headers.tar.gz -T headers.txt \
   ape/config.h              libc/integral             T//gdtoa/gdtoa.h          \
   T//getopt/getopt.h        T//linenoise/linenoise.h  T//musl/crypt.h           \
-  T//musl/fnmatch.h         T//musl/passwd.h          T//musl/rand48.h          \
-  T//musl/tempnam.h         T//regex/regex.h          T//zlib/zconf.h           \
-  T//zlib/zlib.h            \
+  T//musl/fnmatch.h         T//musl/lockf.h           T//musl/passwd.h          \
+  T//musl/rand48.h          T//musl/tempnam.h         T//regex/regex.h          \
+  T//zlib/zconf.h           T//zlib/zlib.h            \
 ;
 
 # install the rest