diff --git a/dune-project b/dune-project
index 5f64694..921db30 100644
--- a/dune-project
+++ b/dune-project
@@ -27,7 +27,7 @@ Contains the `mustache` command line utility for driving logic-less templates.
 ")
  (depends
   (jsonm (>= 1.0.1))
-  (ounit :with-test)
+  (ounit2 :with-test)
   (ezjsonm :with-test)
   (menhir (>= 20180703))
   (cmdliner (>= 1.0.4))
diff --git a/mustache.opam b/mustache.opam
index d5fedca..51e5a0a 100644
--- a/mustache.opam
+++ b/mustache.opam
@@ -18,7 +18,7 @@ bug-reports: "https://github.com/rgrinberg/ocaml-mustache/issues"
 depends: [
   "dune" {>= "2.7"}
   "jsonm" {>= "1.0.1"}
-  "ounit" {with-test}
+  "ounit2" {with-test}
   "ezjsonm" {with-test}
   "menhir" {>= "20180703"}
   "cmdliner" {>= "1.0.4"}