diff --git a/action.yml b/action.yml
index e3fcff4..bf560a6 100644
--- a/action.yml
+++ b/action.yml
@@ -18,6 +18,10 @@ inputs:
     description: "java store password"
     required: false
     default: "changeit"
+  debug:
+    description: "show debug information about certificate truststore content"
+    required: false
+    default: "false"
 outputs:
   certificate-alias:
     value: ${{ steps.generate-alias-name.outputs.alias-name }}
@@ -59,4 +63,16 @@ runs:
           echo "${{ inputs.ca-cert }}" | keytool -import -noprompt -trustcacerts -alias ${{ steps.generate-alias-name.outputs.alias-name }} -keystore ${{ inputs.store-path }} -storepass ${{ inputs.store-password }};
         else
           echo "Certificate ${{ steps.generate-alias-name.outputs.alias-name }} already contained in the truststore";
-        fi
\ No newline at end of file
+        fi
+
+    - name: Show added ${{ steps.generate-alias-name.outputs.alias-name }} for debugging
+      if: ${{ inputs.debug == 'true' }}
+      shell: bash
+      run: | 
+        keytool -list -cacerts | grep antoine
+
+    - name: List cert for debugging
+      if: ${{ inputs.debug == 'true' }}
+      shell: bash
+      run: |
+        keytool -list -cacerts