diff --git a/README.md b/README.md
index c8802388e78a2cfce2f75b7d953709c2ff479737..71794b929ff41a18fa99622c4fcf28a5050e744f 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,7 @@ This version is known to compile with:
  - Coq 8.6.1 / 8.7.0
  - Ssreflect 1.6.4
  - A development version of [Iris](https://gitlab.mpi-sws.org/FP/iris-coq/)
+ - The coq86-devel branch of [Autosubst](https://github.com/uds-psl/autosubst)
 
 The easiest way to install the correct versions of the dependencies is through
 opam.  Once you got opam set up, just run `make build-dep` to install the right
diff --git a/opam b/opam
index 6f095ad827bc9e52af2ba9803acf1399da6d7e4e..d142ea925a3868a52036acf1f98a31807c9b9352 100644
--- a/opam
+++ b/opam
@@ -10,4 +10,5 @@ install: [make "install"]
 remove: ["rm" "-rf" "%{lib}%/coq/user-contrib/iris_examples"]
 depends: [
   "coq-iris" { (= "dev.2017-10-28.10") | (= "dev") }
+  "coq-autosubst" { = "dev.coq86" }
 ]