diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index b78c99c..87a6931 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -31,8 +31,9 @@ jobs:
           pull-request-number: ${{ github.event.pull_request.number }}
           pull-request-body: ${{ github.event.pull_request.body }}
           copy-issues-labels: true # optional
+          include-closed-issues: true # optional
           
-      - name: Echo output
+      - name: Echo output in general
         run: |
           echo "is-pull-request-linked-to-issues: ${{ steps.find-linked-issues.outputs.is-pull-request-linked-to-issues }}"
           echo "linked-issues: ${{ steps.find-linked-issues.outputs.linked-issues }}"
@@ -43,12 +44,14 @@ jobs:
         run: |
           echo "is-pull-request-linked-to-issues: ${{ steps.find-linked-issues.outputs.is-pull-request-linked-to-issues }}"
           echo "linked-issues: ${{ steps.find-linked-issues.outputs.linked-issues }}"
+          echo "pull-request-labels: ${{ steps.find-linked-issues.outputs.pull-request-labels }}"
           
       - name: Echo output when failure and exit
         if: ${{ steps.find-linked-issues.outputs.is-pull-request-linked-to-issues == 'False' }}
         run: |
           echo "is-pull-request-linked-to-issues: ${{ steps.find-linked-issues.outputs.is-pull-request-linked-to-issues }}"
           echo "linked-issues: ${{ steps.find-linked-issues.outputs.linked-issues }}"
+          echo "pull-request-labels: ${{ steps.find-linked-issues.outputs.pull-request-labels }}"
           exit 1
 
   lint-workflow:
diff --git a/README.md b/README.md
index 3d746a7..c136604 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ You can also do this [manually](https://docs.github.com/en/issues/tracking-your-
 | `pull-request-number`              | The pull request number to use. If pull requests are linked.         | **required**             | `${{ github.event.pull_request.number }}` |
 | `pull-request-body`                | The pull request body to search for keywords like `Resolves #48`.    | **required**             | `${{ github.event.pull_request.body }}`   |
 | `copy-issues-labels`               | Copy the labels of the linked issues to the pull request.            | optional                 | `false`                                   |
+| `include-closed-issues`            | Includes closed issues, when searching for linked issues.            | optional                 | `false`                                   |
 | **Name OUTPUTS**                   | **Description**                                                      | **Values**               | **Defaults**                              |
 | `is-pull-request-linked-to-issues` | Whether the pull request is linked to issues or not.                 | `'True'` or `'False'`    | `'False'`                                 |
 | `linked-issues`                    | List of issues that are linked to the pull request.                  | `[1, 2, 4, 82, 124]`     | `[]`                                      |   
@@ -37,6 +38,7 @@ Example workflow:
         pull-request-number: ${{ github.event.pull_request.number }}
         pull-request-body: ${{ github.event.pull_request.body }}
         copy-issues-labels: true # optional
+        include-closed-issues: true # optional
     
     # Use the output from the `find-linked-issues` step
     - name: Use the output
diff --git a/action.yml b/action.yml
index aa6cc9a..b390247 100644
--- a/action.yml
+++ b/action.yml
@@ -24,7 +24,11 @@ inputs:
     description: Copy the labels of the linked issues to the pull request. (optional)
     required: false
     default: 'false'
-  
+  include-closed-issues:
+    description: Includes closed issues, when searching for linked issues. (optional)
+    required: false
+    default: 'false'
+
 outputs:
   is-pull-request-linked-to-issues:
     description: Whether the pull request is linked to issues or not.
diff --git a/main.py b/main.py
index 0db621a..7d56b1d 100644
--- a/main.py
+++ b/main.py
@@ -39,6 +39,16 @@ def main():
     except KeyError:
         copy_issues_labels = False
 
+    try:
+        include_closed_issues = os.environ['INPUT_INCLUDE-CLOSED-ISSUES']
+    except KeyError:
+        include_closed_issues = False
+
+    if include_closed_issues:
+        is_open = "is:open"
+    else:
+        is_open = ""
+
     print("Environment variables fetched successfully")
 
     """ Get pull request """
@@ -69,7 +79,7 @@ def main():
     """ Find issues with GitHub API """
     print("Fetching issues...")
     url = "https://api.github.com/search/issues?q=" \
-          + f"repo:{repository} is:issue is:open linked:pr pr:{pull_request_number} " \
+          + f"repo:{repository} is:issue {is_open} linked:pr pr:{pull_request_number} " \
           + " ".join(str(i) for i in issue_numbers)
     print(f"Request url: {url}")
     headers = {