diff --git a/packages/bam-ppx/bam-ppx.0.3/opam b/packages/bam-ppx/bam-ppx.0.3/opam
new file mode 100644
index 00000000000..c9be321b78a
--- /dev/null
+++ b/packages/bam-ppx/bam-ppx.0.3/opam
@@ -0,0 +1,42 @@
+opam-version: "2.0"
+synopsis: "A PPX deriving generators for OCaml types"
+description:
+  "Provides a way to automatically get generators for a given type"
+maintainer: ["François Thiré"]
+authors: ["François Thiré"]
+license: "MIT"
+tags: ["test" "pbt" "shrinking" "internal" "bam" "ppx"]
+homepage: "https://github.com/francoisthire/bam"
+doc: "https://francoisthire.github.io/bam/"
+bug-reports: "https://github.com/francoisthire/bam/issues"
+depends: [
+  "ocaml" {>= "4.14" & < "5.3"}
+  "dune" {>= "3.7" & >= "3.7"}
+  "ppxlib" {>= "0.32.0"}
+  "dmap" {>= "0.5"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/francoisthire/bam.git"
+url {
+  src:
+    "https://github.com/francoisthire/bam/releases/download/v0.3/bam-0.3.tbz"
+  checksum: [
+    "sha256=6fbb38cad09fb8062841cc67e8cdac279304b8cf1ed14746944cd45246d2a888"
+    "sha512=ad2b880c50921d77e3f190d8e48066407fdf4b9bb168a0e1094cc8ffb234740b53d494089346797d6c7e5bae28f4eb5d95e22b31f9329e3c5817bc506cd652d4"
+  ]
+}
+x-commit-hash: "4fa015377cf63f383cd2c31bd142dd9b347c3263"
diff --git a/packages/bam/bam.0.3/opam b/packages/bam/bam.0.3/opam
new file mode 100644
index 00000000000..f01d686f7f2
--- /dev/null
+++ b/packages/bam/bam.0.3/opam
@@ -0,0 +1,43 @@
+opam-version: "2.0"
+synopsis: "A property-based testing library with internal shrinking"
+description:
+  "A property-based testing allowing to define generators with internal shrinking easily"
+maintainer: ["François Thiré"]
+authors: ["François Thiré"]
+license: "MIT"
+tags: ["test" "pbt" "shrinking" "internal"]
+homepage: "https://github.com/francoisthire/bam"
+doc: "https://francoisthire.github.io/bam/"
+bug-reports: "https://github.com/francoisthire/bam/issues"
+depends: [
+  "ocaml" {>= "4.14"}
+  "dune" {>= "3.7" & >= "3.7"}
+  "pringo"
+  "zarith" {>= "1.13"}
+  "odoc" {with-doc}
+  "tezt" {>= "4.0" & with-test}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/francoisthire/bam.git"
+url {
+  src:
+    "https://github.com/francoisthire/bam/releases/download/v0.3/bam-0.3.tbz"
+  checksum: [
+    "sha256=6fbb38cad09fb8062841cc67e8cdac279304b8cf1ed14746944cd45246d2a888"
+    "sha512=ad2b880c50921d77e3f190d8e48066407fdf4b9bb168a0e1094cc8ffb234740b53d494089346797d6c7e5bae28f4eb5d95e22b31f9329e3c5817bc506cd652d4"
+  ]
+}
+x-commit-hash: "4fa015377cf63f383cd2c31bd142dd9b347c3263"
diff --git a/packages/tezt-bam/tezt-bam.0.2/opam b/packages/tezt-bam/tezt-bam.0.2/opam
index 1ce57b5bf40..78799393a69 100644
--- a/packages/tezt-bam/tezt-bam.0.2/opam
+++ b/packages/tezt-bam/tezt-bam.0.2/opam
@@ -12,8 +12,8 @@ depends: [
   "ocaml"
   "dune" {>= "3.7"}
   "tezt" {>= "4.0"}
-  "bam"
-  "bam-ppx"
+  "bam" {< "0.3"}
+  "bam-ppx" {< "0.3"}
   "mtime" {>= "2.0"}
   "odoc" {with-doc}
 ]
diff --git a/packages/tezt-bam/tezt-bam.0.3/opam b/packages/tezt-bam/tezt-bam.0.3/opam
new file mode 100644
index 00000000000..15fff1611d7
--- /dev/null
+++ b/packages/tezt-bam/tezt-bam.0.3/opam
@@ -0,0 +1,45 @@
+opam-version: "2.0"
+synopsis: "A plugin of [bam] for Tezt"
+description: "Provides a way to register PBT tests with Tezt"
+maintainer: ["François Thiré"]
+authors: ["François Thiré"]
+license: "MIT"
+tags: ["test" "tezt" "pbt" "shrinking" "internal" "bam"]
+homepage: "https://github.com/francoisthire/bam"
+doc: "https://francoisthire.github.io/bam/"
+bug-reports: "https://github.com/francoisthire/bam/issues"
+depends: [
+  "ocaml"
+  "dune" {>= "3.7" & >= "3.7"}
+  "tezt" {>= "4.0"}
+  "bam"  {>= "0.3"}
+  "bam-ppx" {>= "0.3"}
+  "mtime" {>= "2.0"}
+  "odoc" {with-doc}
+]
+build: [
+  ["dune" "subst"] {dev}
+  [
+    "dune"
+    "build"
+    "-p"
+    name
+    "-j"
+    jobs
+    "@install"
+    "@runtest" {with-test}
+    "@doc" {with-doc}
+  ]
+]
+dev-repo: "git+https://github.com/francoisthire/bam.git"
+available: arch != "arm32" & arch != "x86_32"
+url {
+  src:
+    "https://github.com/francoisthire/bam/releases/download/v0.3/bam-0.3.tbz"
+  checksum: [
+    "sha256=6fbb38cad09fb8062841cc67e8cdac279304b8cf1ed14746944cd45246d2a888"
+    "sha512=ad2b880c50921d77e3f190d8e48066407fdf4b9bb168a0e1094cc8ffb234740b53d494089346797d6c7e5bae28f4eb5d95e22b31f9329e3c5817bc506cd652d4"
+  ]
+}
+x-commit-hash: "4fa015377cf63f383cd2c31bd142dd9b347c3263"
+