diff --git a/opam b/opam
index 4141be77f1b26f0d9f65ac82ea71d1734bfd2698..dc465cd209806a98df1b3031ab2396efcb9394d1 100644
--- a/opam
+++ b/opam
@@ -9,5 +9,5 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: [ "sh" "-c" "rm -rf '%{lib}%/coq/user-contrib/igps" ]
 depends: [
-  "coq-iris" { (= "branch.gen_proofmode.2018-02-23.1") | (= "dev") }
+  "coq-iris" { (= "branch.gen_proofmode.2018-02-28.1") | (= "dev") }
 ]