diff --git a/packages/chamelon/chamelon.0.0.10/opam b/packages/chamelon/chamelon.0.0.10/opam
index 4a52031ed22d..e9f964c26ca6 100644
--- a/packages/chamelon/chamelon.0.0.10/opam
+++ b/packages/chamelon/chamelon.0.0.10/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.9.0"}
+  "dune" {>= "2.9.0" & < "3.7.0"}
   "chamelon-unix" {= version & with-test}
   "crowbar" {>= "0.2.1" & with-test}
   "fpath" {>= "0.7.3" & with-test}
diff --git a/packages/chamelon/chamelon.0.0.7/opam b/packages/chamelon/chamelon.0.0.7/opam
index 7cbf08156e33..61541546572f 100644
--- a/packages/chamelon/chamelon.0.0.7/opam
+++ b/packages/chamelon/chamelon.0.0.7/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.9.0"}
+  "dune" {>= "2.9.0" & < "3.7.0"}
   "chamelon-unix" {= version & with-test}
   "fpath" {>= "0.7.3" & with-test}
   "alcotest" {>= "1.5.0" & with-test}
diff --git a/packages/chamelon/chamelon.0.0.8/opam b/packages/chamelon/chamelon.0.0.8/opam
index a00f43252ca8..c755e66c4b92 100644
--- a/packages/chamelon/chamelon.0.0.8/opam
+++ b/packages/chamelon/chamelon.0.0.8/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.9.0"}
+  "dune" {>= "2.9.0" & < "3.7.0"}
   "chamelon-unix" {= version & with-test}
   "fpath" {>= "0.7.3" & with-test}
   "alcotest" {>= "1.5.0" & with-test}
diff --git a/packages/chamelon/chamelon.0.0.9.1/opam b/packages/chamelon/chamelon.0.0.9.1/opam
index 847cea831efc..13eae6926408 100644
--- a/packages/chamelon/chamelon.0.0.9.1/opam
+++ b/packages/chamelon/chamelon.0.0.9.1/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.9.0"}
+  "dune" {>= "2.9.0" & < "3.7.0"}
   "chamelon-unix" {= version & with-test}
   "crowbar" {>= "0.2.1" & with-test}
   "fpath" {>= "0.7.3" & with-test}
diff --git a/packages/chamelon/chamelon.0.1.1/opam b/packages/chamelon/chamelon.0.1.1/opam
index 8335b1fbe137..b40e6ea78051 100644
--- a/packages/chamelon/chamelon.0.1.1/opam
+++ b/packages/chamelon/chamelon.0.1.1/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.9.0"}
+  "dune" {>= "2.9.0" & < "3.7.0"}
   "crowbar" {>= "0.2.1" & with-test}
   "fpath" {>= "0.7.3" & with-test}
   "alcotest" {>= "1.5.0" & with-test}
diff --git a/packages/chamelon/chamelon.0.1.2/opam b/packages/chamelon/chamelon.0.1.2/opam
index 9e80f74df400..16c8bfacc9c9 100644
--- a/packages/chamelon/chamelon.0.1.2/opam
+++ b/packages/chamelon/chamelon.0.1.2/opam
@@ -21,7 +21,7 @@ build: [
 
 depends: [
   "ocaml" {>= "4.10.0"}
-  "dune" {>= "2.9.0"}
+  "dune" {>= "2.9.0" & < "3.7.0"}
   "crowbar" {>= "0.2.1" & with-test}
   "fpath" {>= "0.7.3" & with-test}
   "alcotest" {>= "1.5.0" & with-test}
diff --git a/packages/commons/commons.1.5.5/opam b/packages/commons/commons.1.5.5/opam
index ea24b1004c73..2fb2296c5291 100644
--- a/packages/commons/commons.1.5.5/opam
+++ b/packages/commons/commons.1.5.5/opam
@@ -14,7 +14,7 @@ bug-reports: "https://github.com/returntocorp/semgrep/issues"
 
 depends: [
   "ocaml" {>= "4.12.0"}
-  "dune" {>= "3.2.0" }
+  "dune" {>= "3.2.0" & < "3.7.0"}
   "alcotest" {>= "1.5.0"}
   "ANSITerminal" {>= "0.8.4"}
   "easy_logging" {>= "0.8.1" }
diff --git a/packages/commons/commons.1.8.0/opam b/packages/commons/commons.1.8.0/opam
index a0f65bd085fe..789fd05d852a 100644
--- a/packages/commons/commons.1.8.0/opam
+++ b/packages/commons/commons.1.8.0/opam
@@ -14,7 +14,7 @@ bug-reports: "https://github.com/returntocorp/semgrep/issues"
 
 depends: [
   "ocaml" {>= "4.12.0"}
-  "dune" {>= "3.2.0" }
+  "dune" {>= "3.2.0" & < "3.7.0"}
   "alcotest" {>= "1.5.0"}
   "ANSITerminal" {>= "0.8.4"}
   "cmdliner" {>= "1.1.1" }