diff --git a/README.md b/README.md
index 0e8053a..b073850 100644
--- a/README.md
+++ b/README.md
@@ -66,22 +66,22 @@ jobs:
 
 ## Inputs
 
-| name                                 | description                                                                                                                                                                                                                                                                   | required | default             |
-| ------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- | ------------------- |
-| `working-directory`                  | <p>Working directory for run commands</p>                                                                                                                                                                                                                                     | `false`  | `""`                |
-| `test`                               | <p>Whether to run tests</p>                                                                                                                                                                                                                                                   | `false`  | `true`              |
-| `stack-arguments`                    | <p>Additional arguments for all top-level <code>stack</code> command invocations.</p>                                                                                                                                                                                         | `false`  | `--no-terminal`     |
-| `stack-query-arguments`              | <p>Additional arguments in <code>stack query</code> invocations.</p>                                                                                                                                                                                                          | `false`  | `""`                |
-| `stack-path-arguments`               | <p>Additional arguments in <code>stack path</code> invocations.</p>                                                                                                                                                                                                           | `false`  | `""`                |
-| `stack-setup-arguments`              | <p>Additional arguments in <code>stack setup</code> invocations.</p>                                                                                                                                                                                                          | `false`  | `""`                |
-| `stack-build-arguments`              | <p>Additional arguments for all <code>stack build</code> invocations.</p>                                                                                                                                                                                                     | `false`  | `--fast --pedantic` |
-| `stack-build-arguments-dependencies` | <p>Additional arguments passed after <code>stack-build-arguments</code> in <code>stack build</code> invocations on the <em>Dependencies</em> step.</p>                                                                                                                        | `false`  | `""`                |
-| `stack-build-arguments-build`        | <p>Additional arguments passed after <code>stack-build-arguments</code> in <code>stack build</code> invocations on the <em>Build</em> step.</p>                                                                                                                               | `false`  | `""`                |
-| `stack-build-arguments-test`         | <p>Additional arguments passed after <code>stack-build-arguments</code> in <code>stack build</code> invocations on the <em>Test</em> step.</p>                                                                                                                                | `false`  | `""`                |
-| `cache-prefix`                       | <p>Prefix applied to all cache keys. This can be any value you like, but teams often use <code>v{N}</code> and bump it to <code>v{N+1}</code> when/if they need to explicitly bust caches.</p>                                                                                | `false`  | `""`                |
-| `cache-save-always`                  | <p>Save artifacts to the cache even if the build fails. This may speed up builds in subsequent runs at the expense of slightly-longer builds when a full cache-hit occurs. Since <code>@v4.2.0</code></p>                                                                     | `false`  | `false`             |
-| `upgrade-stack`                      | <p>Upgrade stack</p>                                                                                                                                                                                                                                                          | `false`  | `true`              |
-| `stack-yaml`                         | <p><strong>This option is deprecated</strong> and will be removed in a future version, set <code>env.STACK_YAML</code> or use <code>stack-arguments</code> instead. For now, if present, <code>--stack-yaml ...</code> will be prepended to <code>stack-arguments</code>.</p> | `false`  | `""`                |
+| name                                 | description                                                                                                                                                                                               | required | default             |
+| ------------------------------------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------- | ------------------- |
+| `working-directory`                  | <p>Working directory for run commands</p>                                                                                                                                                                 | `false`  | `""`                |
+| `test`                               | <p>Whether to run tests</p>                                                                                                                                                                               | `false`  | `true`              |
+| `stack-arguments`                    | <p>Additional arguments for all top-level <code>stack</code> command invocations.</p>                                                                                                                     | `false`  | `--no-terminal`     |
+| `stack-query-arguments`              | <p>Additional arguments in <code>stack query</code> invocations.</p>                                                                                                                                      | `false`  | `""`                |
+| `stack-path-arguments`               | <p>Additional arguments in <code>stack path</code> invocations.</p>                                                                                                                                       | `false`  | `""`                |
+| `stack-setup-arguments`              | <p>Additional arguments in <code>stack setup</code> invocations.</p>                                                                                                                                      | `false`  | `""`                |
+| `stack-build-arguments`              | <p>Additional arguments for all <code>stack build</code> invocations.</p>                                                                                                                                 | `false`  | `--fast --pedantic` |
+| `stack-build-arguments-dependencies` | <p>Additional arguments passed after <code>stack-build-arguments</code> in <code>stack build</code> invocations on the <em>Dependencies</em> step.</p>                                                    | `false`  | `""`                |
+| `stack-build-arguments-build`        | <p>Additional arguments passed after <code>stack-build-arguments</code> in <code>stack build</code> invocations on the <em>Build</em> step.</p>                                                           | `false`  | `""`                |
+| `stack-build-arguments-test`         | <p>Additional arguments passed after <code>stack-build-arguments</code> in <code>stack build</code> invocations on the <em>Test</em> step.</p>                                                            | `false`  | `""`                |
+| `cache-prefix`                       | <p>Prefix applied to all cache keys. This can be any value you like, but teams often use <code>v{N}</code> and bump it to <code>v{N+1}</code> when/if they need to explicitly bust caches.</p>            | `false`  | `""`                |
+| `cache-save-always`                  | <p>Save artifacts to the cache even if the build fails. This may speed up builds in subsequent runs at the expense of slightly-longer builds when a full cache-hit occurs. Since <code>@v4.2.0</code></p> | `false`  | `false`             |
+| `upgrade-stack`                      | <p>Upgrade stack</p>                                                                                                                                                                                      | `false`  | `true`              |
+| `stack-yaml`                         | <p><strong>Deprecated</strong> use <code>env.STACK_YAML</code> or <code>stack-arguments</code> instead.</p>                                                                                               | `false`  | `""`                |
 
 <!-- action-docs-inputs action="action.yml" -->
 
diff --git a/action.yml b/action.yml
index 39bfa3f..a4676c9 100644
--- a/action.yml
+++ b/action.yml
@@ -54,9 +54,7 @@ inputs:
     default: true
   stack-yaml:
     description: |
-      **This option is deprecated** and will be removed in a future version, set
-      `env.STACK_YAML` or use `stack-arguments` instead. For now, if present,
-      `--stack-yaml ...` will be prepended to `stack-arguments`.
+      **Deprecated** use `env.STACK_YAML` or `stack-arguments` instead.
 runs:
   using: "node20"
   main: "dist/index.js"