diff --git a/coq-lambda-rust.opam b/coq-lambda-rust.opam
index b67874bb099c1b290c477519dcdc0039ac5dbebe..c2ddd04eaabd0e3952c2030bdebd41a96ecb15f6 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.2021-08-11.1.57194191") | (= "dev") }
+  "coq-gpfsl" { (= "dev.2021-09-01.0.3b7fcbfe") | (= "dev") }
 ]
 
 build: [make "-j%{jobs}%"]