diff --git a/opam b/opam
index 087ccf4f59588ca8682fc9305e097a347a939e79..1cf0e109f971a224899a81aa1afa99608cf3ad18 100644
--- a/opam
+++ b/opam
@@ -10,5 +10,5 @@ install: [make "install"]
 remove: [ "sh" "-c" "rm -rf '%{lib}%/coq/user-contrib/igps" ]
 depends: [
   "coq" { (>= "8.8.2" & < "8.10~") | (= "dev") }
-  "coq-iris" { (= "dev.2019-01-28.2.bfd9a459") | (= "dev") }
+  "coq-iris" { (= "dev.2019-01-30.0.5221eb39") | (= "dev") }
 ]
diff --git a/theories/examples/hashtable.v b/theories/examples/hashtable.v
index fb7258d1bb3e79aad2deb33e05e744f128b96a37..35217eef2f5e4b162f52bf012106eb6ed74ee68a 100644
--- a/theories/examples/hashtable.v
+++ b/theories/examples/hashtable.v
@@ -1984,11 +1984,9 @@ Section proof.
 
   Lemma Qc_div_div : forall q p1 p2, (q / p1 / p2 = q / (p1 * p2))%Qp.
   Proof.
-    intros.
-    apply Qp_ext.
-    unfold Qp_div; simpl.
-    rewrite Pos2Z.inj_mul Z2Qc_inj_mul Qcanon.Qcinv_mult_distr.
-    rewrite Qcanon.Qcmult_assoc; done.
+    intros. apply Qp_ext.
+    by rewrite /Qp_div /= Pos2Z.inj_mul Z2Qc_inj_mul /Qcanon.Qcdiv
+               Qcanon.Qcinv_mult_distr Qcanon.Qcmult_assoc.
   Qed.
 
   Lemma big_sepL_sep_persistent {A} (Φ : nat → A → vProp Σ) l P {_ : Persistent P}: