diff --git a/coq-lambda-rust.opam b/coq-lambda-rust.opam
index 3c154ba7cbfdee548176e2c323b994c6db6d5a46..d061db512451ec32f728301e696dfe1481ec837e 100644
--- a/coq-lambda-rust.opam
+++ b/coq-lambda-rust.opam
@@ -13,7 +13,7 @@ the type system, and safety proof for some Rust libraries.
 """
 
 depends: [
-  "coq-iris" { (= "dev.2021-07-28.2.fb31118e") | (= "dev") }
+  "coq-iris" { (= "dev.2021-07-29.1.13063825") | (= "dev") }
 ]
 
 build: [make "-j%{jobs}%"]