diff --git a/packages/river/river.0.3/opam b/packages/river/river.0.3/opam
new file mode 100644
index 00000000000..e88a60b1e48
--- /dev/null
+++ b/packages/river/river.0.3/opam
@@ -0,0 +1,46 @@
+opam-version: "2.0"
+synopsis: "RSS2 and Atom feed aggregator for OCaml"
+description: "RSS2 and Atom feed aggregator for OCaml"
+maintainer: ["KC Sivaramakrishnan <sk826@cl.cam.ac.uk>"]
+authors: ["KC Sivaramakrishnan <sk826@cl.cam.ac.uk>"]
+license: "MIT"
+homepage: "https://github.com/kayceesrk/river"
+doc: "https://kayceesrk.github.io/river/"
+bug-reports: "https://github.com/kayceesrk/river/issues"
+depends: [
+  "ocaml" {>= "4.08.0"}
+  "dune" {>= "3.0"}
+  "syndic" {>= "1.5"}
+  "cohttp" {>= "5.0.0"}
+  "cohttp-lwt" {>= "5.0.0"}
+  "cohttp-lwt-unix" {>= "5.0.0"}
+  "ptime"
+  "lwt"
+  "ocamlnet"
+  "lambdasoup"
+  "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/kayceesrk/river.git"
+url {
+  src:
+    "https://github.com/kayceesrk/river/releases/download/0.3/river-0.3.tbz"
+  checksum: [
+    "sha256=f05073d1412f003b4266d0dcafa54f9740571e8016bd0850bdf7f1562fe11054"
+    "sha512=cf8b319bd5d3952abf205937883b71cfb27107bb550990bc3d9f12d80ed87f5b6e87f126caf711f24ff7c2de9f3c0a5d27661088f87cddbbce9b58a4b2394ace"
+  ]
+}
+x-commit-hash: "b990f702d29c7a7139920d701154e9db595eae1f"