diff --git a/CHANGELOG.md b/CHANGELOG.md
index b99a198..3fc6620 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,7 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 - nginx / client_max_body_size option - set by command line option or environmental variable.
 - nginx / proxy-read-timeout option - set by command line option or environmental variable.
 - Dokku app names are cleaned up. Invalid characters are changed to "-". Lower case is enforced.
+- ps:sale - set by command line option or environmental variable.
 
 ## Changed
 
diff --git a/docs/reference/deploy-command.rst b/docs/reference/deploy-command.rst
index 0c9e16f..7d12ac9 100644
--- a/docs/reference/deploy-command.rst
+++ b/docs/reference/deploy-command.rst
@@ -97,3 +97,10 @@ Sets the Nginx Proxy Read Timeout.
 Pass a string to `--nginxproxyreadtimeout` or set the `DOKKUSD_NGINX_PROXY_READ_TIMEOUT` environmental variable.
 
 Should include units. eg `120s` not `120`.
+
+Scale Processes
+~~~~~~~~~~~~~~~
+
+Sets the ps:scale command, to set the number of each different type of process types to run.
+
+Pass a string to `--psscale` or set the `DOKKUSD_PS_SCALE` environmental variable.
diff --git a/dokkusd/cli.py b/dokkusd/cli.py
index edfe041..3aacbe8 100644
--- a/dokkusd/cli.py
+++ b/dokkusd/cli.py
@@ -63,6 +63,11 @@ def main() -> None:
         help="Sets a value for Nginx Proxy Read Timeout. Include units eg 120s",
         default=os.getenv("DOKKUSD_NGINX_PROXY_READ_TIMEOUT"),
     )
+    deploy_parser.add_argument(
+        "--psscale",
+        help="Sets values for scale command. eg web=1 worker=2",
+        default=os.getenv("DOKKUSD_PS_SCALE"),
+    )
 
     ### Destroy
     destroy_parser = subparsers.add_parser("destroy")
@@ -117,6 +122,7 @@ def main() -> None:
             environment_variables=env_vars,
             nginx_client_max_body_size=args.nginxclientmaxbodysize,
             nginx_proxy_read_timeout=args.nginxproxyreadtimeout,
+            ps_scale=args.psscale,
         )
         deploy.go()
 
diff --git a/dokkusd/deploy.py b/dokkusd/deploy.py
index 2dbf7b3..e8a227f 100644
--- a/dokkusd/deploy.py
+++ b/dokkusd/deploy.py
@@ -24,6 +24,7 @@ def __init__(
         environment_variables: dict = {},
         nginx_client_max_body_size=None,
         nginx_proxy_read_timeout=None,
+        ps_scale=None,
     ):
         super().__init__(
             directory=directory,
@@ -38,6 +39,7 @@ def __init__(
         self.environment_variables_json_string = environment_variables_json_string
         self._nginx_client_max_body_size = nginx_client_max_body_size
         self._nginx_proxy_read_timeout = nginx_proxy_read_timeout
+        self._ps_scale = ps_scale
 
     def go(self) -> None:
 
@@ -173,6 +175,19 @@ def go(self) -> None:
             print(stdout)
             print(stderr)
 
+        # --------------------- PS scale
+        if self._ps_scale:
+            print("Ps: scale ...")
+            command = [
+                "ps:scale",
+                self.app_name,
+                "--skip-deploy",
+            ]
+            command.extend([i.strip() for i in self._ps_scale.split(" ") if i.strip()])
+            stdout, stderr = self._dokku_command(command)
+            print(stdout)
+            print(stderr)
+
         # --------------------- Deploy
         print("Deploy ...")
         process = subprocess.Popen(