diff --git a/src/lib_stdlib/tezos-stdlib.opam b/src/lib_stdlib/tezos-stdlib.opam
index c81efc3eb..c382a1232 100644
--- a/src/lib_stdlib/tezos-stdlib.opam
+++ b/src/lib_stdlib/tezos-stdlib.opam
@@ -9,10 +9,10 @@ license: "unreleased"
 depends: [
   "ocamlfind" { build }
   "jbuilder" { build & = "1.0+beta19.1" }
-  "cstruct"
+  "bigstring"
   "hex"
   "ocplib-endian"
-  "stringext"
+  "re"
   "lwt"
   "zarith"
   "alcotest" { test }