diff --git a/opam b/opam
index 82259addde4540286c91027be36b8ec8753a52ff..e1d398034589669ff4a0a0239f7721edefc4a9cb 100644
--- a/opam
+++ b/opam
@@ -9,6 +9,6 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: ["rm" "-rf" "%{lib}%/coq/user-contrib/reloc"]
 depends: [
-  "coq-iris-heap-lang" { (= "dev.2021-07-28.0.3424ace5") | (= "dev") }
+  "coq-iris-heap-lang" { (= "dev.2021-09-06.2.95df9887") | (= "dev") }
   "coq-autosubst" { = "dev" }
 ]