diff --git a/packages/hpack/hpack.0.1.0/opam b/packages/hpack/hpack.0.1.0/opam
index 1763f414f24..8a6b279becd 100644
--- a/packages/hpack/hpack.0.1.0/opam
+++ b/packages/hpack/hpack.0.1.0/opam
@@ -8,7 +8,7 @@ bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 dev-repo: "git+https://github.com/anmonteiro/ocaml-h2.git"
 doc: "https://anmonteiro.github.io/ocaml-h2/"
 depends: [
-  "ocaml" {>= "4.04"}
+  "ocaml" {>= "4.04" & < "5.3"}
   "dune" {>= "1.7"}
   "yojson" {with-test}
   "hex" {with-test}
diff --git a/packages/hpack/hpack.0.10.0/opam b/packages/hpack/hpack.0.10.0/opam
index 6d8ba2e8851..aaaa7ae7912 100644
--- a/packages/hpack/hpack.0.10.0/opam
+++ b/packages/hpack/hpack.0.10.0/opam
@@ -9,7 +9,7 @@ homepage: "https://github.com/anmonteiro/ocaml-h2"
 bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 depends: [
   "dune" {>= "2.7"}
-  "ocaml" {>= "4.08.0"}
+  "ocaml" {>= "4.08.0" & < "5.3"}
   "angstrom"
   "faraday" {>= "0.7.3"}
   "yojson" {with-test}
diff --git a/packages/hpack/hpack.0.11.0/opam b/packages/hpack/hpack.0.11.0/opam
index f43359875c9..9e9a3444422 100644
--- a/packages/hpack/hpack.0.11.0/opam
+++ b/packages/hpack/hpack.0.11.0/opam
@@ -9,7 +9,7 @@ homepage: "https://github.com/anmonteiro/ocaml-h2"
 bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 depends: [
   "dune" {>= "2.7"}
-  "ocaml" {>= "4.08.0"}
+  "ocaml" {>= "4.08.0" & < "5.3"}
   "angstrom"
   "faraday" {>= "0.7.3"}
   "yojson" {with-test}
diff --git a/packages/hpack/hpack.0.12.0/opam b/packages/hpack/hpack.0.12.0/opam
index e7b0b079375..e7fb3608f31 100644
--- a/packages/hpack/hpack.0.12.0/opam
+++ b/packages/hpack/hpack.0.12.0/opam
@@ -9,7 +9,7 @@ homepage: "https://github.com/anmonteiro/ocaml-h2"
 bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 depends: [
   "dune" {>= "2.7"}
-  "ocaml" {>= "4.08.0"}
+  "ocaml" {>= "4.08.0" & < "5.3"}
   "angstrom"
   "faraday" {>= "0.7.3"}
   "yojson" {with-test}
diff --git a/packages/hpack/hpack.0.2.0/opam b/packages/hpack/hpack.0.2.0/opam
index db76b60de92..9642c0bc6b6 100644
--- a/packages/hpack/hpack.0.2.0/opam
+++ b/packages/hpack/hpack.0.2.0/opam
@@ -8,7 +8,7 @@ bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 dev-repo: "git+https://github.com/anmonteiro/ocaml-h2.git"
 doc: "https://anmonteiro.github.io/ocaml-h2/"
 depends: [
-  "ocaml" {>= "4.04"}
+  "ocaml" {>= "4.04" & < "5.3"}
   "dune" {>= "1.7"}
   "yojson" {with-test}
   "hex" {with-test}
diff --git a/packages/hpack/hpack.0.9.0/opam b/packages/hpack/hpack.0.9.0/opam
index 2692c1d9890..377c8b20800 100644
--- a/packages/hpack/hpack.0.9.0/opam
+++ b/packages/hpack/hpack.0.9.0/opam
@@ -8,7 +8,7 @@ bug-reports: "https://github.com/anmonteiro/ocaml-h2/issues"
 dev-repo: "git+https://github.com/anmonteiro/ocaml-h2.git"
 doc: "https://anmonteiro.github.io/ocaml-h2/"
 depends: [
-  "ocaml" {>= "4.04"}
+  "ocaml" {>= "4.04" & < "5.3"}
   "dune" {>= "1.7"}
   "yojson" {with-test}
   "hex" {with-test}