diff --git a/fstar.opam b/fstar.opam
index 5644ba9f7ed..dabb3103013 100644
--- a/fstar.opam
+++ b/fstar.opam
@@ -1,5 +1,5 @@
 opam-version: "2.0"
-version: "2021.12.17~dev"
+version: "2021.12.18~dev"
 maintainer: "taramana@microsoft.com"
 authors: "Nik Swamy <nswamy@microsoft.com>,Jonathan Protzenko <protz@microsoft.com>,Tahina Ramananandro <taramana@microsoft.com>"
 homepage: "http://fstar-lang.org"
diff --git a/version.txt b/version.txt
index 8320fac3a9e..3c84e61ddc8 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-2021.12.17~dev
+2021.12.18~dev