diff --git a/.github/workflows/test-rio.yml b/.github/workflows/test-rio.yml
index 84d257b9..f698493a 100644
--- a/.github/workflows/test-rio.yml
+++ b/.github/workflows/test-rio.yml
@@ -76,14 +76,14 @@ jobs:
       - name: Notify queue down
         env:
           SLACK_URL: ${{ secrets.SLACK_URL }}
-        if: ${{ steps.test_rio.outputs.ERROR_STATUS == -1 }}
+        if: ${{ steps.test_rio.outputs.ERROR_STATUS == 255 }}
         run: |
           curl -q -H "Content-Type: application/json" -X POST -d '{"text": "RIO Queue is DOWN"}' $SLACK_URL
           exit 1
       - name: Notify error
         env:
           SLACK_URL: ${{ secrets.SLACK_URL }}
-        if: ${{ steps.test_rio.outputs.ERROR_STATUS == -2 }}
+        if: ${{ steps.test_rio.outputs.ERROR_STATUS == 254 }}
         run: |
           curl -q -H "Content-Type: application/json" -X POST -d '{"text": "Error while checking RIO Queue"}' $SLACK_URL
           exit 1
diff --git a/project.clj b/project.clj
index 78d8f962..6b640e39 100644
--- a/project.clj
+++ b/project.clj
@@ -11,7 +11,7 @@
                  ;; data
                  [org.clojure/data.json "2.5.0"]
                  [org.clojure/data.xml "0.0.8"]
-                 [org.apache.santuario/xmlsec "4.0.2"]
+                 [org.apache.santuario/xmlsec "4.0.3"]
 
                  ;; interaction
                  [clj-http "3.13.0"]
diff --git a/src/nl/surf/eduhub_rio_mapper/cli_commands.clj b/src/nl/surf/eduhub_rio_mapper/cli_commands.clj
index 0a2f5edd..c84ba173 100644
--- a/src/nl/surf/eduhub_rio_mapper/cli_commands.clj
+++ b/src/nl/surf/eduhub_rio_mapper/cli_commands.clj
@@ -92,9 +92,9 @@
           (when-let [ex-data (ex-data ex)]
             (when (= :down (:rio-queue-status ex-data))
               (println "The RIO Queue is DOWN")
-              (System/exit -1)))
+              (System/exit 255)))
           (println "An unexpected exception has occurred: " ex)
-          (System/exit -2))))
+          (System/exit 254))))
 
     "get"
     (let [[client-info rest-args] (parse-client-info-args args clients)]