diff --git a/landscape.yml b/landscape.yml
index bbddfe8362a..c63e4cd2812 100644
--- a/landscape.yml
+++ b/landscape.yml
@@ -9310,7 +9310,7 @@ landscape:
               summary_intro_url: ''
               clomonitor_name: jaeger
               audits:
-                - date: 2019--05-04
+                - date: '2019-05-04'
                   type: security
                   url: https://github.com/jaegertracing/security-audits/blob/master/SECURITY_AUDIT_2019_05_04.pdf
                   vendor: Cure53