diff --git a/zenoh-common.opam b/zenoh-common.opam
index 113def3fcb..fbbab1ee9d 100644
--- a/zenoh-common.opam
+++ b/zenoh-common.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -40,7 +40,7 @@ depends: [
   "lwt_ppx"  {= "2.0.0" }
   "apero-core" {= "0.4.7"}
   "apero-time" {= "0.4.7"}
-  "zenoh-net-ocaml" {= "0.4.1"}
+  "zenoh-net-ocaml" {= "0.4.2-M1"}
 ]
 
 synopsis : "Zenoh common OCaml library"
diff --git a/zenoh-http.opam b/zenoh-http.opam
index 498b67d612..8e0495e58b 100644
--- a/zenoh-http.opam
+++ b/zenoh-http.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -37,7 +37,7 @@ depends: [
   "ocaml" {= "4.07.1"}
   "dune" {= "2.3.0" }
   "lwt" {= "5.1.1" }
-  "zenoh-router" {= "0.4.1"}
+  "zenoh-router" {= "0.4.2-M1"}
   "httpaf" {= "0.6.5"}
   "httpaf-lwt-unix" {= "0.6.5"}
   "ocp-ocamlres" {= "0.4"}
diff --git a/zenoh-net-ocaml.opam b/zenoh-net-ocaml.opam
index 42543622c3..98575f2b29 100644
--- a/zenoh-net-ocaml.opam
+++ b/zenoh-net-ocaml.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -40,7 +40,7 @@ depends: [
   "lwt" {= "5.1.1" }
   "apero-core" {= "0.4.7"}
   "apero-net" {= "0.4.7"}
-  "zenoh-proto" {= "0.4.1"}
+  "zenoh-proto" {= "0.4.2-M1"}
 ]
 synopsis : "The zenoh-net ocaml API"
 description: """
diff --git a/zenoh-ocaml.opam b/zenoh-ocaml.opam
index 833a492f6c..52bd551518 100644
--- a/zenoh-ocaml.opam
+++ b/zenoh-ocaml.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -37,7 +37,7 @@ depends: [
   "ppx_deriving"  {= "4.4" }
   "lwt_ppx"  {= "2.0.0" }
   "apero-core" {= "0.4.7"}
-  "zenoh-common" {= "0.4.1"}
+  "zenoh-common" {= "0.4.2-M1"}
 ]
 
 synopsis : "Zenoh OCaml API"
diff --git a/zenoh-proto.opam b/zenoh-proto.opam
index 84f0fdaffb..3b660047db 100644
--- a/zenoh-proto.opam
+++ b/zenoh-proto.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
diff --git a/zenoh-router-daemon.opam b/zenoh-router-daemon.opam
index c692785f86..0baca9b64d 100644
--- a/zenoh-router-daemon.opam
+++ b/zenoh-router-daemon.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -34,7 +34,7 @@ depends: [
   "lwt" {= "5.1.1" }
   "apero-core" {= "0.4.7"}
   "apero-net" {= "0.4.7"}
-  "zenoh-proto" {= "0.4.1"}
+  "zenoh-proto" {= "0.4.2-M1"}
 ]
 synopsis : "The zenoh router"
 description: """
diff --git a/zenoh-router-lib.opam b/zenoh-router-lib.opam
index 7b6b180664..3cbf34261d 100644
--- a/zenoh-router-lib.opam
+++ b/zenoh-router-lib.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -39,7 +39,7 @@ depends: [
   "lwt" {= "5.1.1" }
   "apero-core" {= "0.4.7"}
   "apero-net" {= "0.4.7"}
-  "zenoh-proto" {= "0.4.1"}
+  "zenoh-proto" {= "0.4.2-M1"}
 ]
 synopsis : "The zenoh router library"
 description: """
diff --git a/zenoh-router.opam b/zenoh-router.opam
index 2c137dfc13..ae285b0a22 100644
--- a/zenoh-router.opam
+++ b/zenoh-router.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -42,9 +42,9 @@ depends: [
   "cmdliner" {= "1.0.4" }
   "apero-core" {= "0.4.7"}
   "apero-net" {= "0.4.7"}
-  "zenoh-proto" {= "0.4.1"}
-  "zenoh-net-ocaml" {= "0.4.1"}
-  "zenoh-tx-inet" {= "0.4.1"}
+  "zenoh-proto" {= "0.4.2-M1"}
+  "zenoh-net-ocaml" {= "0.4.2-M1"}
+  "zenoh-tx-inet" {= "0.4.2-M1"}
 ]
 synopsis : "The zenoh routing engine"
 description: """
diff --git a/zenoh-storages-be-influxdb.opam b/zenoh-storages-be-influxdb.opam
index 7e2861cb43..1a2a8ce494 100644
--- a/zenoh-storages-be-influxdb.opam
+++ b/zenoh-storages-be-influxdb.opam
@@ -21,7 +21,7 @@ dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 synopsis:     "The zenoh InfluxDB backend"
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -38,5 +38,5 @@ install: [
 depends: [
   "ocaml" {= "4.07.1"}
   "dune" {= "2.3.0" }
-  "zenoh-storages-be-lib" {= "0.4.1"}
+  "zenoh-storages-be-lib" {= "0.4.2-M1"}
 ]
diff --git a/zenoh-storages-be-lib.opam b/zenoh-storages-be-lib.opam
index fbb64b29eb..75c5b9ebc1 100644
--- a/zenoh-storages-be-lib.opam
+++ b/zenoh-storages-be-lib.opam
@@ -21,7 +21,7 @@ dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 synopsis:     "The zenoh backend common library"
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -38,5 +38,5 @@ install: [
 depends: [
   "ocaml" {= "4.07.1"}
   "dune" {= "2.3.0" }
-  "zenoh-common" {= "0.4.1"}
+  "zenoh-common" {= "0.4.2-M1"}
 ]
diff --git a/zenoh-storages-be-memory.opam b/zenoh-storages-be-memory.opam
index 3eb6ff4551..3101357b11 100644
--- a/zenoh-storages-be-memory.opam
+++ b/zenoh-storages-be-memory.opam
@@ -21,7 +21,7 @@ dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 synopsis:     "The zenoh memory backend"
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -38,5 +38,5 @@ install: [
 depends: [
   "ocaml" {= "4.07.1"}
   "dune" {= "2.3.0" }
-  "zenoh-storages-be-lib" {= "0.4.1"}
+  "zenoh-storages-be-lib" {= "0.4.2-M1"}
 ]
diff --git a/zenoh-storages-be-sql.opam b/zenoh-storages-be-sql.opam
index 10fb9fed67..6cc9fc401d 100644
--- a/zenoh-storages-be-sql.opam
+++ b/zenoh-storages-be-sql.opam
@@ -21,7 +21,7 @@ dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 synopsis:     "The zenoh SQL backend"
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -43,5 +43,5 @@ depends: [
   "caqti-driver-mariadb" {= "1.2.1" }
   "caqti-driver-postgresql" {= "1.2.1" }
   "caqti-lwt" {= "1.2.0" }
-  "zenoh-storages-be-lib" {= "0.4.1"}
+  "zenoh-storages-be-lib" {= "0.4.2-M1"}
 ]
diff --git a/zenoh-storages.opam b/zenoh-storages.opam
index db46935057..016f5e8027 100644
--- a/zenoh-storages.opam
+++ b/zenoh-storages.opam
@@ -21,7 +21,7 @@ dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 synopsis:     "The zenoh storages plugin"
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -38,8 +38,8 @@ install: [
 depends: [
   "ocaml" {= "4.07.1"}
   "dune" {= "2.3.0" }
-  "zenoh-router" {= "0.4.1"}
-  "zenoh-common" {= "0.4.1"}
-  "zenoh-storages-be-memory" {= "0.4.1"}
-  "zenoh-storages-be-sql" {= "0.4.1"}
+  "zenoh-router" {= "0.4.2-M1"}
+  "zenoh-common" {= "0.4.2-M1"}
+  "zenoh-storages-be-memory" {= "0.4.2-M1"}
+  "zenoh-storages-be-sql" {= "0.4.2-M1"}
 ]
diff --git a/zenoh-tx-inet.opam b/zenoh-tx-inet.opam
index 84d3094266..de7287fb81 100644
--- a/zenoh-tx-inet.opam
+++ b/zenoh-tx-inet.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -39,7 +39,7 @@ depends: [
   "lwt" {= "5.1.1" }
   "apero-core" {= "0.4.7"}
   "apero-net" {= "0.4.7"}
-  "zenoh-proto" {= "0.4.1"}
+  "zenoh-proto" {= "0.4.2-M1"}
 ]
 synopsis : "The zenoh transport framework"
 description: """
diff --git a/zenoh.opam b/zenoh.opam
index 7c601b410a..983b4bf81d 100644
--- a/zenoh.opam
+++ b/zenoh.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [
@@ -38,8 +38,8 @@ depends: [
   "lwt" {= "5.1.1" }
   "apero-core" {= "0.4.7"}
   "apero-net" {= "0.4.7"}
-  "zenoh-proto" {= "0.4.1"}
-  "zenoh-net-ocaml" {= "0.4.1"}
+  "zenoh-proto" {= "0.4.2-M1"}
+  "zenoh-net-ocaml" {= "0.4.2-M1"}
   "alcotest" {with-test & = "1.0.1"}
 ]
 
diff --git a/zn_storage.opam b/zn_storage.opam
index 8b4283edd0..adc3eec725 100644
--- a/zn_storage.opam
+++ b/zn_storage.opam
@@ -20,7 +20,7 @@ bug-reports:  "https://github.com/atolab/zenoh/issues/"
 dev-repo:     "git+https://github.com/atolab/zenoh.git"
 tags:         ["zenoh"]
 
-version: "0.4.1"
+version: "0.4.2-M1"
 license: ["EPL-2.0" "Apache-2.0"]
 
 build: [