diff --git a/cdp-generator.opam b/cdp-generator.opam
index 6c43ae5..ec53d17 100644
--- a/cdp-generator.opam
+++ b/cdp-generator.opam
@@ -7,7 +7,7 @@ license: "MIT"
 homepage: "https://github.com/eWert-Online/reason-cdp"
 bug-reports: "https://github.com/eWert-Online/reason-cdp/issues"
 depends: [
-  "cmdliner"
+  "cmdliner" {< "2.0.0"}
   "dune" {>= "2.8"}
   "fileutils"
   "ocamlformat"
diff --git a/dune-project b/dune-project
index a26b7f5..747b990 100644
--- a/dune-project
+++ b/dune-project
@@ -21,4 +21,11 @@
 (package
  (name "cdp-generator")
  (synopsis "Chrome DevTools Protocol types generator")
- (depends cmdliner dune fileutils ocamlformat ocaml yojson))
+ (depends
+  (cmdliner
+   (< 2.0.0))
+  dune
+  fileutils
+  ocamlformat
+  ocaml
+  yojson))