diff --git a/dune-project b/dune-project
index e95e3bd..9141910 100644
--- a/dune-project
+++ b/dune-project
@@ -21,6 +21,11 @@
  (name ppx_minidebug)
  (synopsis "Debug logs for selected functions and let-bindings")
  (description "A poor man's `ppx_debug` with formatted logs of let-bound values, function arguments and results.")
- (depends ocaml dune ppx_deriving ppx_sexp_conv ppxlib printbox printbox-text printbox-html ptime sexplib0)
+ (depends
+  (ocaml (>= 4.08))
+  dune ppx_deriving ppx_sexp_conv
+  (ppxlib (>= 0.25.0))
+  printbox printbox-text printbox-html ptime sexplib0
+  (ppx_expect (and :with-test (>= v0.9.0))))
  (tags
   (logger debugger "printf debugging")))
diff --git a/ppx_minidebug.opam b/ppx_minidebug.opam
index e6ce8f8..32952bf 100644
--- a/ppx_minidebug.opam
+++ b/ppx_minidebug.opam
@@ -12,16 +12,17 @@ homepage: "https://github.com/lukstafi/ppx_minidebug"
 doc: "https://lukstafi.github.io/ppx_minidebug/ppx_minidebug"
 bug-reports: "https://github.com/lukstafi/ppx_minidebug/issues"
 depends: [
-  "ocaml"
+  "ocaml" {>= "4.08"}
   "dune" {>= "3.7"}
   "ppx_deriving"
   "ppx_sexp_conv"
-  "ppxlib"
+  "ppxlib" {>= "0.25.0"}
   "printbox"
   "printbox-text"
   "printbox-html"
   "ptime"
   "sexplib0"
+  "ppx_expect" {with-test & >= "v0.9.0"}
   "odoc" {with-doc}
 ]
 build: [