diff --git a/packages/bechamel-js/bechamel-js.0.3.0/opam b/packages/bechamel-js/bechamel-js.0.3.0/opam
index 272e7702eee..fc0631ab7e0 100644
--- a/packages/bechamel-js/bechamel-js.0.3.0/opam
+++ b/packages/bechamel-js/bechamel-js.0.3.0/opam
@@ -20,6 +20,7 @@ depends: [
   "dune"       {>= "2.0.0"}
   "bechamel"   {= version}
   "rresult"
+  "result"     {>= "1.5"}
   "json-data-encoding"
   "jsonm"
   "fmt"        {>= "0.9.0"}
diff --git a/packages/bechamel-js/bechamel-js.0.4.0/opam b/packages/bechamel-js/bechamel-js.0.4.0/opam
index 84c716ada26..60105b3c337 100644
--- a/packages/bechamel-js/bechamel-js.0.4.0/opam
+++ b/packages/bechamel-js/bechamel-js.0.4.0/opam
@@ -20,6 +20,7 @@ depends: [
   "dune"       {>= "2.0.0"}
   "bechamel"   {= version}
   "rresult"
+  "result" {>= "1.5"}
   "json-data-encoding"
   "jsonm"
   "fmt"        {>= "0.9.0"}
diff --git a/packages/bechamel-js/bechamel-js.0.5.0/opam b/packages/bechamel-js/bechamel-js.0.5.0/opam
index e221e563cda..2e06f997412 100644
--- a/packages/bechamel-js/bechamel-js.0.5.0/opam
+++ b/packages/bechamel-js/bechamel-js.0.5.0/opam
@@ -20,6 +20,7 @@ depends: [
   "dune"       {>= "2.0.0"}
   "bechamel"   {= version}
   "rresult"
+  "result"     {>= "1.5"}
   "json-data-encoding"
   "jsonm"
   "fmt"        {>= "0.9.0"}
diff --git a/packages/fat-filesystem/fat-filesystem.0.13.0/opam b/packages/fat-filesystem/fat-filesystem.0.13.0/opam
index b30b1dd9d9f..42507eca00f 100644
--- a/packages/fat-filesystem/fat-filesystem.0.13.0/opam
+++ b/packages/fat-filesystem/fat-filesystem.0.13.0/opam
@@ -18,6 +18,7 @@ depends: [
   "mirage-block-unix" {>= "2.5.0"}
   "io-page-unix" {>= "2.0.0"}
   "re" {>= "1.7.2"}
+  "result"
   "cmdliner"
   "astring"
   "alcotest" {with-test}
diff --git a/packages/multipart_form/multipart_form.0.1.0/opam b/packages/multipart_form/multipart_form.0.1.0/opam
index c7d10297d0e..9898f694769 100644
--- a/packages/multipart_form/multipart_form.0.1.0/opam
+++ b/packages/multipart_form/multipart_form.0.1.0/opam
@@ -27,6 +27,7 @@ depends: [
   "uutf"
   "stdlib-shims"
   "pecu"       {>= "0.4"}
+  "result"
   "fmt"
   "ke"         {>= "0.4"}
   "alcotest"   {with-test}
diff --git a/packages/multipart_form/multipart_form.0.4.1/opam b/packages/multipart_form/multipart_form.0.4.1/opam
index d33be0ac48a..4ccbac82b02 100644
--- a/packages/multipart_form/multipart_form.0.4.1/opam
+++ b/packages/multipart_form/multipart_form.0.4.1/opam
@@ -20,6 +20,7 @@ depends: [
   "uutf"
   "pecu" {>= "0.4"}
   "prettym"
+  "result"
   "fmt" {>= "0.8.7"}
   "logs"
   "ke" {>= "0.6"}
diff --git a/packages/multipart_form/multipart_form.0.5.0/opam b/packages/multipart_form/multipart_form.0.5.0/opam
index a1f502c75d0..9b2d561cba0 100644
--- a/packages/multipart_form/multipart_form.0.5.0/opam
+++ b/packages/multipart_form/multipart_form.0.5.0/opam
@@ -19,6 +19,7 @@ depends: [
   "uutf"
   "pecu" {>= "0.4"}
   "prettym"
+  "result"
   "fmt" {>= "0.8.7"}
   "logs"
   "ke" {>= "0.6"}
diff --git a/packages/piaf/piaf.0.1.0/opam b/packages/piaf/piaf.0.1.0/opam
index f4ac67d16c9..d9aff3c8e06 100644
--- a/packages/piaf/piaf.0.1.0/opam
+++ b/packages/piaf/piaf.0.1.0/opam
@@ -24,6 +24,7 @@ depends: [
   "mrmime" {>= "0.3.2" & < "0.4.0"}
   "pecu"
   "psq"
+  "result"
   "uri"
   "magic-mime"
   "gluten-lwt-unix"
diff --git a/packages/session-cohttp-async/session-cohttp-async.0.4.0/opam b/packages/session-cohttp-async/session-cohttp-async.0.4.0/opam
index c48f175b738..f6fa87fa64d 100644
--- a/packages/session-cohttp-async/session-cohttp-async.0.4.0/opam
+++ b/packages/session-cohttp-async/session-cohttp-async.0.4.0/opam
@@ -15,6 +15,7 @@ depends: [
   "ocaml"
   "jbuilder" {>= "1.0+beta9"}
   "session-cohttp"
+  "result" {>= "1.5"}
   "cohttp-async"
   "async"
   "base-threads"
diff --git a/packages/session-cohttp-async/session-cohttp-async.0.4.1/opam b/packages/session-cohttp-async/session-cohttp-async.0.4.1/opam
index ff20a6575dd..ffcc508005b 100644
--- a/packages/session-cohttp-async/session-cohttp-async.0.4.1/opam
+++ b/packages/session-cohttp-async/session-cohttp-async.0.4.1/opam
@@ -12,6 +12,7 @@ depends: [
   "cohttp-async"
   "async"
   "base-threads"
+  "result" {>= "1.5"}
 ]
 build: [
   ["dune" "subst"] {dev}
diff --git a/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.0/opam b/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.0/opam
index 5392723ff2b..41d34e0e5d3 100644
--- a/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.0/opam
+++ b/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.0/opam
@@ -17,6 +17,7 @@ depends: [
   "session-cohttp"
   "cohttp-lwt"
   "lwt"
+  "result" {>= "1.5"}
 ]
 synopsis:
   "A session manager for your everyday needs - Cohttp-specific support for lwt"
diff --git a/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.1/opam b/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.1/opam
index ac30f0abffe..26f81f10cc2 100644
--- a/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.1/opam
+++ b/packages/session-cohttp-lwt/session-cohttp-lwt.0.4.1/opam
@@ -11,6 +11,7 @@ depends: [
   "session-cohttp"
   "cohttp-lwt"
   "lwt"
+  "result" {>= "1.5"}
 ]
 build: [
   ["dune" "subst"] {dev}
diff --git a/packages/session-cookie-async/session-cookie-async.0.1.8/opam b/packages/session-cookie-async/session-cookie-async.0.1.8/opam
index 2f0e57d1b55..6dc3f8ebafd 100644
--- a/packages/session-cookie-async/session-cookie-async.0.1.8/opam
+++ b/packages/session-cookie-async/session-cookie-async.0.1.8/opam
@@ -13,6 +13,7 @@ depends: [
   "ocaml" {>= "4.07.0"}
   "session-cookie" {= version}
   "async"
+  "result" {>= "1.5"}
   "alcotest" {with-test}
   "junit" {with-test}
   "junit_alcotest" {with-test}
diff --git a/packages/session-cookie-lwt/session-cookie-lwt.0.1.8/opam b/packages/session-cookie-lwt/session-cookie-lwt.0.1.8/opam
index 8b9887ce4b1..4abf78fab2c 100644
--- a/packages/session-cookie-lwt/session-cookie-lwt.0.1.8/opam
+++ b/packages/session-cookie-lwt/session-cookie-lwt.0.1.8/opam
@@ -13,6 +13,7 @@ depends: [
   "ocaml" {>= "4.07.0"}
   "session-cookie" {= version}
   "lwt"
+  "result" {>= "1.5"}
   "base" {with-test}
   "alcotest" {with-test}
   "junit" {with-test}