diff --git a/README.md b/README.md
index adf1de2..6bdb24f 100644
--- a/README.md
+++ b/README.md
@@ -18,6 +18,7 @@ For more information on inputs, see the [API Documentation](https://developer.gi
 - `version`: The chart-testing version to install (default: `3.14.0`)
 - `yamllint_version`: The `yamllint` version to install (default: `1.33.0`)
 - `yamale_version`: The `yamale` version to install (default: `6.0.0`)
+- `lint_config`: Path to a custom yamllint config file. If set, it replaces the default `lintconf.yaml` used by `ct lint` (default: none)
 
 ### Example Workflow
 
diff --git a/action.yml b/action.yml
index 1b657d2..c380ad4 100644
--- a/action.yml
+++ b/action.yml
@@ -21,6 +21,10 @@ inputs:
     description: "The uv version to install (default: latest)"
     required: false
     default: 'latest'
+  lint_config:
+    description: "Path to a custom yamllint config file. If set, it replaces the default lintconf.yaml used by ct lint."
+    required: false
+    default: ''
 runs:
   using: composite
   steps:
@@ -35,3 +39,8 @@ runs:
             --yamllint-version ${{ inputs.yamllint_version }} \
             --yamale-version ${{ inputs.yamale_version }}
       shell: bash
+    - if: inputs.lint_config != ''
+      run: |
+        cp "${{ inputs.lint_config }}" "${CT_CONFIG_DIR}/lintconf.yaml"
+        echo "Custom yamllint config applied to ${CT_CONFIG_DIR}/lintconf.yaml"
+      shell: bash