diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3fd7cb1f..cc82a5b3 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,9 +5,40 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
-## [Unreleased]
+## [v1.9.0](https://github.com/rash-sh/rash/tree/v1.9.0) - 2023-09-07
 
-### To be removed in v1.9.0
+### Added
+
+* task: Add `vars` optional field
+
+### Build
+
+* Upgrade to Rust 1.70 and fix new clippy warnings
+* Update compatible versions
+* Upgrade incompatible versions
+* Add memfd feature to ipc-channel
+* Disable memfd for ipc-channel
+* Set resolver = "2"
+
+### Documentation
+
+* Add dotfile description
+* Fix readme typo
+
+### Fixed
+
+* ci: Update workers to latest versions
+* ci: Upgrade cache action version to v2
+* ci: Update to node16 github actions
+* ci: Replace `actions-rs/toolchain` with `dtolnay/rust-toolchain`
+* ci: Change dtolnay/rust-toolchaint to stable
+* ci: Remove container and downgrade to ubuntu 20
+* core: Improve docopt performance prefiltering possible options
+* core: Handle docopt edge cases with optiona arguments
+* task: Improve error message when become fails
+* Cargo clippy errors
+
+### Removed
 
 * Command module: `transfer_pid_1` (use `transfer_pid` instead)
 
diff --git a/Cargo.lock b/Cargo.lock
index df52b036..57936753 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -840,7 +840,7 @@ dependencies = [
 
 [[package]]
 name = "mdbook_rash"
-version = "1.8.6"
+version = "1.9.0"
 dependencies = [
  "chrono",
  "clap",
@@ -1077,7 +1077,7 @@ dependencies = [
 
 [[package]]
 name = "rash_core"
-version = "1.8.6"
+version = "1.9.0"
 dependencies = [
  "byte-unit",
  "cargo-husky",
@@ -1110,7 +1110,7 @@ dependencies = [
 
 [[package]]
 name = "rash_derive"
-version = "1.8.6"
+version = "1.9.0"
 dependencies = [
  "proc-macro2",
  "quote",
diff --git a/Cargo.toml b/Cargo.toml
index 810d41e7..df95b345 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,9 +8,9 @@ resolver = "2"
 
 
 [workspace.package]
-version = "1.8.6"
+version = "1.9.0"
 authors = ["Pando85 <pando855@gmail.com>"]
-rust-version = "1.70"
+rust-version = "1.72"
 edition = "2021"
 license-file = "LICENSE"
 homepage = "https://rash.sh"
diff --git a/mdbook_rash/Cargo.toml b/mdbook_rash/Cargo.toml
index 83547de5..74250943 100644
--- a/mdbook_rash/Cargo.toml
+++ b/mdbook_rash/Cargo.toml
@@ -15,7 +15,7 @@ path = "src/bin/mdbook-rash.rs"
 doc = false
 
 [dependencies]
-rash_core = { path = "../rash_core", features = ["docs"], version = "1.8.6" }
+rash_core = { path = "../rash_core", features = ["docs"], version = "1.9.0" }
 lazy_static.workspace = true
 log.workspace = true
 regex.workspace = true
diff --git a/rash_core/Cargo.toml b/rash_core/Cargo.toml
index a7e3473d..0d9fe955 100644
--- a/rash_core/Cargo.toml
+++ b/rash_core/Cargo.toml
@@ -21,7 +21,7 @@ path = "src/bin/rash.rs"
 docs = ["rash_derive/docs", "schemars"]
 
 [dependencies]
-rash_derive = { path = "../rash_derive", version = "1.8.6" }
+rash_derive = { path = "../rash_derive", version = "1.9.0" }
 lazy_static.workspace = true
 log.workspace = true
 regex.workspace = true
diff --git a/rash_core/src/modules/command.rs b/rash_core/src/modules/command.rs
index c0792562..28155069 100644
--- a/rash_core/src/modules/command.rs
+++ b/rash_core/src/modules/command.rs
@@ -58,9 +58,6 @@ pub struct Params {
     pub chdir: Option<String>,
     #[serde(flatten)]
     pub required: Required,
-    /// [DEPRECATED] Execute command as PID 1.
-    /// Note: from this point on, your rash script execution is transferred to the command
-    pub transfer_pid_1: Option<bool>,
     /// Execute command as PID 1.
     /// Note: from this point on, your rash script execution is transferred to the command
     pub transfer_pid: Option<bool>,
@@ -118,17 +115,13 @@ impl Module for Command {
             Some(s) => Params {
                 chdir: None,
                 required: Required::Cmd(s.to_string()),
-                transfer_pid_1: None,
                 transfer_pid: None,
             },
             None => parse_params(optional_params)?,
         };
 
         match params.transfer_pid {
-            Some(true) => {
-                warn!("transfer_pid_1 option will be removed in 1.9.0");
-                exec_transferring_pid(params)
-            }
+            Some(true) => exec_transferring_pid(params),
             None | Some(false) => match params.transfer_pid {
                 Some(true) => exec_transferring_pid(params),
                 None | Some(false) => {
@@ -222,7 +215,6 @@ mod tests {
             Params {
                 chdir: None,
                 required: Required::Cmd("ls".to_string()),
-                transfer_pid_1: None,
                 transfer_pid: Some(false),
             }
         );