diff --git a/DEPS b/DEPS
index 38e8121..54dc5c4 100644
--- a/DEPS
+++ b/DEPS
@@ -44,7 +44,7 @@
   # co19 is a cipd package. Use update.sh in tests/co19[_2] to update these
   # hashes. It requires access to the dart-build-access group, which EngProd
   # has.
-  "co19_rev": "9c07e26d67665de7972ba6f7e87369933a978545",
+  "co19_rev": "373869fb6ab96191868589e73a13711c31690402",
   "co19_2_rev": "e48b3090826cf40b8037648f19d211e8eab1b4b6",
 
   # The internal benchmarks to use. See go/dart-benchmarks-internal
diff --git a/tools/VERSION b/tools/VERSION
index 22e6c0a..4c0e772 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 10
 PATCH 0
-PRERELEASE 99
+PRERELEASE 100
 PRERELEASE_PATCH 0
\ No newline at end of file