diff --git a/validate-inputs/action.yml b/validate-inputs/action.yml
index 4fcd90a..5553e8e 100644
--- a/validate-inputs/action.yml
+++ b/validate-inputs/action.yml
@@ -213,6 +213,10 @@ outputs:
 runs:
   using: composite
   steps:
+    - name: Install Python dependencies
+      shell: bash
+      run: pip install pyyaml==6.0.3
+
     - name: Validate Action Inputs with Python
       id: validate
       shell: bash