diff --git a/uniq.opam b/uniq.opam
index d754167..d0cb69f 100644
--- a/uniq.opam
+++ b/uniq.opam
@@ -11,9 +11,9 @@ depends: [
   "ocaml"       {>= "4.07.0"}
   "dune"        {>= "2.8.0"}
   "codept"      {>= "0.13.0"}
-  "opam-state"
-  "opam-format"
-  "opam-core"
+  "opam-state"  {= opam-version}
+  "opam-format" {= opam-version}
+  "opam-core"   {= opam-version}
   "logs"
   "fmt"
   "fpath"