diff --git a/coq-lambda-rust.opam b/coq-lambda-rust.opam
index 03d19f9734119c2cb697c8f45349b8c8817231b4..48f00a75b189a5b72f3659f9568a25cc08ee27fd 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.2021-06-03.0.d0c552b5") | (= "dev") }
+  "coq-gpfsl" { (= "dev.2021-06-06.0.5b953c99") | (= "dev") }
 ]
 
 build: [make "-j%{jobs}%"]