diff --git a/coq-lambda-rust.opam b/coq-lambda-rust.opam
index 0a58cdf737fa8eb8d4943f39c64bb9404838f0c4..65c16c0e759edb7e107934a55231d354a8bc64c9 100644
--- a/coq-lambda-rust.opam
+++ b/coq-lambda-rust.opam
@@ -15,7 +15,7 @@ This branch uses a proper weak memory model.
 """
 
 depends: [
-  "coq-gpfsl" { (= "dev.2021-06-18.0.336531e4") | (= "dev") }
+  "coq-gpfsl" { (= "dev.2021-06-27.0.bf367fe7") | (= "dev") }
 ]
 
 build: [make "-j%{jobs}%"]