diff --git a/CHANGELOG.md b/CHANGELOG.md
index b9fc6002e..84df565d4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,24 @@
+1.0.0-rc.1 (June 1, 2024)
+========================
+BUG FIXES:
+----------
+
+* Error in attributes value for healthy_threshold ([GH-450](https://github.com/outscale/terraform-provider-outscale/issues/450))
+
+FEATURES:
+---------
+
+* Enable adding Tag on boot disk ([GH-110](https://github.com/outscale/terraform-provider-outscale/issues/110))
+* Enable linked multiple flexible GPUs to VM ([GH-220](https://github.com/outscale/terraform-provider-outscale/issues/220))
+
+IMPROVEMENT:
+-----------
+
+* Upgrade to Terraform-plugin-sdkv2 and terraform-plugin-framework ([GH-150](https://github.com/outscale/terraform-provider-outscale/issues/150))
+* Somes refactoring
+
+
+
 0.12.0 (April 13, 2024)
 ========================
 BUG FIXES:
diff --git a/README.md b/README.md
index e37d06294..4854d8df2 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 - Website: https://www.terraform.io
 - [![Gitter chat](https://badges.gitter.im/hashicorp-terraform/Lobby.png)](https://gitter.im/hashicorp-terraform/Lobby)
 - Mailing list: [Google Groups](http://groups.google.com/group/terraform-tool)
-<img  alt="Terraform"  src="https://camo.githubusercontent.com/1a4ed08978379480a9b1ca95d7f4cc8eb80b45ad47c056a7cfb5c597e9315ae5/68747470733a2f2f7777772e6461746f636d732d6173736574732e636f6d2f323838352f313632393934313234322d6c6f676f2d7465727261666f726d2d6d61696e2e737667"  width="200px">
+<img  alt="Terraform"  src="https://camo.githubusercontent.com/6d6ec94bb2909d75122df9cf17e1940b522a805587c890a2e37a57eba61f7eb1/68747470733a2f2f7777772e6461746f636d732d6173736574732e636f6d2f323838352f313632393934313234322d6c6f676f2d7465727261666f726d2d6d61696e2e737667"  width="200px">
 
 ## Requirements
 
@@ -13,6 +13,79 @@
 - [Go](https://golang.org/doc/install) 1.22.0 (to build the provider plugin)
 
 
+## Migration to v1
+
+> [!WARNING]
+>
+> Before you begin using the ```v1``` binary on your Terraform code, make sure to back up your state file!
+> If you are using a local state file, you can just copy of your terraform.tfstate file in your project directory.
+>
+> If you are using a remote backend such as an S3 bucket, make sure that you follow the backup procedures and that you exercise the restore procedure at least once.
+>
+> Additionally, make sure you backup or version your code as migration will require some code changes (on Flexible_gpu resource).
+
+### Step 1: Upgrade provider version
+
+```sh
+terraform {
+  required_providers {
+    outscale = {
+      source = "outscale/outscale"
+      version = "1.0.0-rc.1"
+    }
+  }
+}
+
+provider "outscale" {
+  # Configuration options
+}
+```
+
+```sh
+terraform init -upgrade
+```
+
+### Step 2: Edit terraform state and configuration files
+
+Somes block types changed in terraform state, the following script will delete those blocks.
+
+Then ``` terraform refresh``` or ``` terraform apply ``` will set the right block type.
+
+#### On Linux
+```sh
+terraform fmt
+sed -i '/"block_device_mappings_created": \[/, /\],/d' terraform.tfstate
+sed -i 's/outscale_volumes_link/outscale_volume_link/g' terraform.tfstate
+sed -i '/"link_public_ip": {/, /},/d' terraform.tfstate
+sed -i '/"link_nic": {/, /},/d' terraform.tfstate
+sed -i '/"flexible_gpu_id": "/, /",/d' terraform.tfstate
+sed -i 's/outscale_volumes_link/outscale_volume_link/g' *.tf
+sed -i 's/flexible_gpu_id /flexible_gpu_ids /g' *.tf
+sed -i '/flexible_gpu_ids /s/= /= \[/' *.tf
+sed -i '/outscale_flexible_gpu\./s/$/ \]/' *.tf
+terraform fmt
+```
+
+#### On MacOS
+```sh
+terraform fmt
+sed -i='' '/"block_device_mappings_created": \[/, /\],/d' terraform.tfstate
+sed -i='' 's/outscale_volumes_link/outscale_volume_link/g' terraform.tfstate
+sed -i='' '/"link_public_ip": {/, /},/d' terraform.tfstate
+sed -i='' '/"link_nic": {/, /},/d' terraform.tfstate
+sed -i='' '/"flexible_gpu_id": "/, /",/d' terraform.tfstate
+sed -i='' 's/outscale_volumes_link/outscale_volume_link/g' *.tf
+sed -i='' 's/flexible_gpu_id /flexible_gpu_ids /g' *.tf
+sed -i='' '/flexible_gpu_ids /s/= /= \[/' *.tf
+sed -i='' '/outscale_flexible_gpu\./s/$/\]/' *.tf
+terraform fmt
+```
+### Step 3: Refresh configuration to update terraform state
+
+```sh
+terraform refresh
+```
+
 ## Breaking change
 
 > **Warning**