diff --git a/packages/ojs-base/ojs-base.0.1.0/opam b/packages/ojs-base/ojs-base.0.1.0/opam
index 1c9387ca116..73f3dae3141 100644
--- a/packages/ojs-base/ojs-base.0.1.0/opam
+++ b/packages/ojs-base/ojs-base.0.1.0/opam
@@ -15,7 +15,7 @@ depends: [
   "ocamlfind"
   "js_of_ocaml" {>= "2.4.0" & < "3.0"}
   "websocket" {>= "0.8.1"}
-  "lwt" {>= "2.4.6"}
+  "lwt" {>= "2.4.6" & < "5.8.0"}
   "yojson" {>= "1.1.8"}
   "ppx_deriving_yojson" {>= "1.1" & < "2.0"}
 ]
diff --git a/packages/ojs-base/ojs-base.0.2.0/opam b/packages/ojs-base/ojs-base.0.2.0/opam
index 0ee03b4ca45..e76e0a73dce 100644
--- a/packages/ojs-base/ojs-base.0.2.0/opam
+++ b/packages/ojs-base/ojs-base.0.2.0/opam
@@ -15,7 +15,7 @@ depends: [
   "ocamlfind"
   "js_of_ocaml" {>= "2.4.0" & < "3.0"}
   "websocket" {= "0.8.1"}
-  "lwt" {>= "2.4.6"}
+  "lwt" {>= "2.4.6" & < "5.8.0"}
   "yojson" {= "1.1.8"}
   "ppx_deriving_yojson" {= "2.0"}
 ]
diff --git a/packages/ojs-base/ojs-base.0.3.0/opam b/packages/ojs-base/ojs-base.0.3.0/opam
index f75bac6447a..315870b9dda 100644
--- a/packages/ojs-base/ojs-base.0.3.0/opam
+++ b/packages/ojs-base/ojs-base.0.3.0/opam
@@ -21,7 +21,7 @@ depends: [
   "ocamlfind"
   "js_of_ocaml" {>= "2.5" & < "3.0"}
   "websocket" {>= "2.1"}
-  "lwt" {>= "2.4.8"}
+  "lwt" {>= "2.4.8" & < "5.8.0"}
   "cohttp" {>= "0.18.2"}
   "yojson" {>= "1.1.8"}
   "ppx_deriving_yojson" {>= "2.3"}
diff --git a/packages/ojs-base/ojs-base.0.4.0/opam b/packages/ojs-base/ojs-base.0.4.0/opam
index 56a2ae5dfe8..b641dcbfb53 100644
--- a/packages/ojs-base/ojs-base.0.4.0/opam
+++ b/packages/ojs-base/ojs-base.0.4.0/opam
@@ -21,7 +21,7 @@ depends: [
   "ocamlfind"
   "js_of_ocaml" {>= "2.5" & < "3.0"}
   "websocket" {>= "2.1"}
-  "lwt" {>= "2.4.8"}
+  "lwt" {>= "2.4.8" & < "5.8.0"}
   "cohttp" {>= "0.18.2"}
   "yojson" {>= "1.1.8"}
   "ppx_deriving_yojson" {>= "2.3"}
diff --git a/packages/ojs-base/ojs-base.0.5.0/opam b/packages/ojs-base/ojs-base.0.5.0/opam
index d34b312beff..a242469dc8c 100644
--- a/packages/ojs-base/ojs-base.0.5.0/opam
+++ b/packages/ojs-base/ojs-base.0.5.0/opam
@@ -18,7 +18,7 @@ depends: [
   "ocamlfind"
   "js_of_ocaml" {>= "2.5" & < "3.0"}
   "websocket" {>= "2.6"}
-  "lwt" {>= "2.5"}
+  "lwt" {>= "2.5" & < "5.8.0"}
   "cohttp" {>= "0.19.3"}
   "yojson" {>= "1.1.8"}
   "ppx_deriving_yojson" {>= "3.0"}
diff --git a/packages/ojs-base/ojs-base.0.6.0/opam b/packages/ojs-base/ojs-base.0.6.0/opam
index 431be6f91d1..065902f7968 100644
--- a/packages/ojs-base/ojs-base.0.6.0/opam
+++ b/packages/ojs-base/ojs-base.0.6.0/opam
@@ -14,7 +14,7 @@ depends: [
   "js_of_ocaml" {>= "3.9.0"}
   "websocket" {>= "2.14"}
   "websocket-lwt-unix" {>= "2.14"}
-  "lwt" {>= "5.4.0"}
+  "lwt" {>= "5.4.0" & < "5.8.0"}
   "lwt_ppx" {>= "2.0.2"}
   "cohttp" {>= "4.0.0"}
   "yojson" {>= "1.7.0"}
diff --git a/packages/picos/picos.0.1.0/opam b/packages/picos/picos.0.1.0/opam
index 92ff818bb00..a9238d168c7 100644
--- a/packages/picos/picos.0.1.0/opam
+++ b/packages/picos/picos.0.1.0/opam
@@ -22,12 +22,12 @@ depends: [
   "mdx" {>= "2.4.0" & with-test}
   "ocaml-version" {>= "3.6.4" & with-test}
   "domain_shims" {>= "0.1.0" & with-test}
-  "js_of_ocaml" {>= "5.4.0" & with-test}
+  "js_of_ocaml" {>= "5.4.0" & < "5.9.0" & with-test}
   "conf-npm" {arch != "x86_32" & arch != "riscv64" & with-test}
   "dscheck" {>= "0.4.0" & with-test}
   "sherlodoc" {>= "0.2" & with-doc}
   "odoc" {>= "2.4.1" & with-doc}
-  "ocaml" {>= "4.12.0"}
+  "ocaml" {>= "4.13.0"}
 ]
 build: [
   ["dune" "subst"] {dev}
diff --git a/packages/picos/picos.0.2.0/opam b/packages/picos/picos.0.2.0/opam
index 06a701bc9f9..b66a4516f2d 100644
--- a/packages/picos/picos.0.2.0/opam
+++ b/packages/picos/picos.0.2.0/opam
@@ -22,12 +22,12 @@ depends: [
   "mdx" {>= "2.4.0" & with-test}
   "ocaml-version" {>= "3.6.4" & with-test}
   "domain_shims" {>= "0.1.0" & with-test}
-  "js_of_ocaml" {>= "5.4.0" & with-test}
+  "js_of_ocaml" {>= "5.4.0" & < "5.9.0" & with-test}
   "conf-npm" {arch != "x86_32" & arch != "riscv64" & with-test}
   "dscheck" {>= "0.4.0" & with-test}
   "sherlodoc" {>= "0.2" & with-doc}
   "odoc" {>= "2.4.1" & with-doc}
-  "ocaml" {>= "4.12.0"}
+  "ocaml" {>= "4.13.0"}
 ]
 build: [
   ["dune" "subst"] {dev}
diff --git a/packages/picos/picos.0.3.0/opam b/packages/picos/picos.0.3.0/opam
index 450d69d2c16..40f28458d1c 100644
--- a/packages/picos/picos.0.3.0/opam
+++ b/packages/picos/picos.0.3.0/opam
@@ -23,12 +23,12 @@ depends: [
   "mdx" {>= "2.4.0" & with-test}
   "ocaml-version" {>= "3.6.4" & with-test}
   "domain_shims" {>= "0.1.0" & with-test}
-  "js_of_ocaml" {>= "5.4.0" & with-test}
+  "js_of_ocaml" {>= "5.4.0" & < "5.9.0" & with-test}
   "conf-npm" {arch != "x86_32" & arch != "riscv64" & with-test}
   "dscheck" {>= "0.4.0" & with-test}
   "sherlodoc" {>= "0.2" & with-doc}
   "odoc" {>= "2.4.1" & with-doc}
-  "ocaml" {>= "4.12.0"}
+  "ocaml" {>= "4.13.0"}
 ]
 build: [
   ["dune" "subst"] {dev}
diff --git a/packages/picos/picos.0.4.0/opam b/packages/picos/picos.0.4.0/opam
index 367455d6cda..97e3186817a 100644
--- a/packages/picos/picos.0.4.0/opam
+++ b/packages/picos/picos.0.4.0/opam
@@ -23,7 +23,7 @@ depends: [
   "mdx" {>= "2.4.0" & with-test}
   "ocaml-version" {>= "3.6.4" & with-test}
   "domain_shims" {>= "0.1.0" & with-test}
-  "js_of_ocaml" {>= "5.4.0" & with-test}
+  "js_of_ocaml" {>= "5.4.0" & < "5.9.0" & with-test}
   "conf-npm" {arch != "x86_32" & arch != "riscv64" & with-test}
   "dscheck" {>= "0.4.0" & with-test}
   "sherlodoc" {>= "0.2" & with-doc}
diff --git a/packages/picos_meta/picos_meta.0.5.0/opam b/packages/picos_meta/picos_meta.0.5.0/opam
index 0967fabfc1d..988d07f3395 100644
--- a/packages/picos_meta/picos_meta.0.5.0/opam
+++ b/packages/picos_meta/picos_meta.0.5.0/opam
@@ -26,7 +26,7 @@ depends: [
   "conf-npm"
     {arch != "x86_32" & arch != "riscv64" & os != "win32" & with-test}
   "domain_shims" {>= "0.1.0" & with-test}
-  "js_of_ocaml" {>= "5.4.0" & with-test}
+  "js_of_ocaml" {>= "5.4.0" & < "5.9.0" & with-test}
   "mdx" {>= "2.4.0" & with-test}
   "multicore-bench" {>= "0.1.4" & with-test}
   "multicore-magic" {>= "2.3.0" & with-test}
diff --git a/packages/picos_meta/picos_meta.0.6.0/opam b/packages/picos_meta/picos_meta.0.6.0/opam
index 4fe19a111ee..d2ddc88fe70 100644
--- a/packages/picos_meta/picos_meta.0.6.0/opam
+++ b/packages/picos_meta/picos_meta.0.6.0/opam
@@ -26,7 +26,7 @@ depends: [
   "conf-npm"
     {arch != "x86_32" & arch != "riscv64" & os != "win32" & with-test}
   "domain_shims" {>= "0.1.0" & with-test}
-  "js_of_ocaml" {>= "5.4.0" & with-test}
+  "js_of_ocaml" {>= "5.4.0" & < "5.9.0" & with-test}
   "mdx" {>= "2.4.0" & with-test}
   "multicore-bench" {>= "0.1.7" & with-test}
   "multicore-magic" {>= "2.3.0" & with-test}