diff --git a/coq-lambda-rust.opam b/coq-lambda-rust.opam
index 5993a3be21998290aac5877f01883cffa4c0459c..bc8b4867e4e1793937ecf689dcb97fef53e5a3f7 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.2020-11-13.2.ec3a2a2a") | (= "dev") }
+  "coq-iris" { (= "dev.2020-12-10.1.872fe77b") | (= "dev") }
 ]
 
 build: [make "-j%{jobs}%"]
diff --git a/theories/lang/races.v b/theories/lang/races.v
index 35044a021429ee59321637384e4bc62e2ed28a16..9c923d16b3bb559d6299e631353459b23824f250 100644
--- a/theories/lang/races.v
+++ b/theories/lang/races.v
@@ -1,5 +1,4 @@
 From stdpp Require Import gmap.
-From iris.program_logic Require Export hoare.
 From iris.program_logic Require Import adequacy.
 From lrust.lang Require Import tactics.
 Set Default Proof Using "Type".