diff --git a/build.sh b/build.sh
index ba83b19..f4b2bb9 100755
--- a/build.sh
+++ b/build.sh
@@ -29,6 +29,17 @@ usage ()
     echo "      help: show this message"
     echo "          ./build.sh help"
     echo ""
+    echo "     ********************************************"
+    echo "     On Error:"
+
+    echo "        Get https://hub.swarmlab.io:5480/v2/: x509: certificate"
+    echo "        Pulling …"
+    echo "        ERROR: Get https://hub.swarmlab.io:5480/v2/: x509: certificate signed by unknown authority"
+    echo ""
+    echo "    run:" 
+    echo "        ./0-get-certs.sh "
+    echo "     ********************************************"
+    echo ""
     echo "  "
 }