diff --git a/opam b/opam
index a05d6e105d64f03cd9df9ad719b5be40ed4e1bee..e883ee8ae08a78a580b370aa0b78b13016230a92 100644
--- a/opam
+++ b/opam
@@ -9,5 +9,5 @@ build: [make "-j%{jobs}%"]
 install: [make "install"]
 remove: ["rm" "-rf" "%{lib}%/coq/user-contrib/iris_atomic"]
 depends: [
-  "coq-iris" { (= "dev.2017-12-18.1") | (= "dev") }
+  "coq-iris" { (= "dev.2018-02-21.1") | (= "dev") }
 ]
diff --git a/theories/peritem.v b/theories/peritem.v
index 0f8674a2ea754c5c85c56e90fe90b70b07089bf4..1dd9614e6f88c3264b8d243ba39612bb49714126 100644
--- a/theories/peritem.v
+++ b/theories/peritem.v
@@ -5,7 +5,7 @@ From iris.proofmode Require Import tactics.
 From iris.algebra Require Import frac auth gmap csum.
 From iris.base_logic Require Import big_op.
 From iris_atomic Require Export treiber misc.
-From iris.base_logic.lib Require Import invariants namespaces.
+From iris.base_logic.lib Require Import invariants.
 
 Section defs.
   Context `{heapG Σ} (N: namespace).