diff --git a/.github/workflows/python_integration_tests.yaml b/.github/workflows/python_integration_tests.yaml
index f225949..a6c5d9a 100644
--- a/.github/workflows/python_integration_tests.yaml
+++ b/.github/workflows/python_integration_tests.yaml
@@ -7,10 +7,9 @@ on:
         description: API token of the Python testing user on Apify
         required: true
     inputs:
-      python-version:
+      python-versions:
         description: List of Python versions to be used
-        default: '["3.9", "3.10", "3.11", "3.12", "3.13"]'
-        required: false
+        required: true
         type: string
 
 # Concurrency control to ensure only one instance of this workflow runs at a time.
@@ -27,7 +26,7 @@ jobs:
     if: github.event.pull_request.head.repo.owner.login == 'apify' || github.ref == 'refs/heads/master'
     strategy:
       matrix:
-        python-version: ${{ fromJSON(inputs.python-version)}}
+        python-version: ${{ fromJSON(inputs.python-versions)}}
       max-parallel: 1 # No parallel tests to avoid exceeding API limits.
 
     steps:
diff --git a/.github/workflows/python_lint_check.yaml b/.github/workflows/python_lint_check.yaml
index 229f99b..3646b0e 100644
--- a/.github/workflows/python_lint_check.yaml
+++ b/.github/workflows/python_lint_check.yaml
@@ -3,10 +3,9 @@ name: Lint check
 on:
   workflow_call:
     inputs:
-      python-version:
+      python-versions:
         description: List of Python versions to be used
-        default: '["3.9", "3.10", "3.11", "3.12", "3.13"]'
-        required: false
+        required: true
         type: string
 
 jobs:
@@ -15,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ${{ fromJSON(inputs.python-version)}}
+        python-version: ${{ fromJSON(inputs.python-versions)}}
 
     steps:
       - name: Checkout repository
diff --git a/.github/workflows/python_type_check.yaml b/.github/workflows/python_type_check.yaml
index a5b3b4a..1861d8f 100644
--- a/.github/workflows/python_type_check.yaml
+++ b/.github/workflows/python_type_check.yaml
@@ -3,10 +3,9 @@ name: Type check
 on:
   workflow_call:
     inputs:
-      python-version:
+      python-versions:
         description: List of Python versions to be used
-        default: '["3.9", "3.10", "3.11", "3.12", "3.13"]'
-        required: false
+        required: true
         type: string
 
 jobs:
@@ -15,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ${{ fromJSON(inputs.python-version)}}
+        python-version: ${{ fromJSON(inputs.python-versions)}}
 
     steps:
       - name: Checkout repository
diff --git a/.github/workflows/python_unit_tests.yaml b/.github/workflows/python_unit_tests.yaml
index ef211e4..d3d8059 100644
--- a/.github/workflows/python_unit_tests.yaml
+++ b/.github/workflows/python_unit_tests.yaml
@@ -7,10 +7,9 @@ on:
         required: false
         description: Used to set the HTTPBIN_URL environment variable
     inputs:
-      python-version:
+      python-versions:
         description: List of Python versions to be used
-        default: '["3.9", "3.10", "3.11", "3.12", "3.13"]'
-        required: false
+        required: true
         type: string
 
 jobs:
@@ -20,7 +19,7 @@ jobs:
       fail-fast: false
       matrix:
         os: ["ubuntu-latest", "windows-latest"]
-        python-version: ${{ fromJSON(inputs.python-version)}}
+        python-version: ${{ fromJSON(inputs.python-versions)}}
     runs-on: ${{ matrix.os }}
     env:
       HTTPBIN_URL: ${{ secrets.httpbin_url || 'https://httpbin.org' }}