diff --git a/dune.opam b/dune.opam
index 713730b386c..41f1722185b 100644
--- a/dune.opam
+++ b/dune.opam
@@ -43,7 +43,7 @@ build: [
 depends: [
   # Please keep the lower bound in sync with .github/workflows/workflow.yml,
   # dune-project and min_ocaml_version in bootstrap.ml
-  ("ocaml" {>= "4.08"} | ("ocaml" {< "4.08~~"} & "ocamlfind-secondary"))
+  ("ocaml" {>= "4.08"} | ("ocaml" {>= "4.02" & < "4.08~~"} & "ocamlfind-secondary"))
   "base-unix"
   "base-threads"
 ]
diff --git a/dune.opam.template b/dune.opam.template
index 4149cba8ad1..85369abf6ae 100644
--- a/dune.opam.template
+++ b/dune.opam.template
@@ -5,7 +5,7 @@ build: [
 depends: [
   # Please keep the lower bound in sync with .github/workflows/workflow.yml,
   # dune-project and min_ocaml_version in bootstrap.ml
-  ("ocaml" {>= "4.08"} | ("ocaml" {< "4.08~~"} & "ocamlfind-secondary"))
+  ("ocaml" {>= "4.08"} | ("ocaml" {>= "4.02" & < "4.08~~"} & "ocamlfind-secondary"))
   "base-unix"
   "base-threads"
 ]