diff --git a/tools/test_apps/protocols/mqtt/publish_connect_test/ca.crt b/tools/test_apps/protocols/mqtt/publish_connect_test/ca.crt
index f53f647..e371e07 100644
--- a/tools/test_apps/protocols/mqtt/publish_connect_test/ca.crt
+++ b/tools/test_apps/protocols/mqtt/publish_connect_test/ca.crt
@@ -1,19 +1,19 @@
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 -----END CERTIFICATE-----
diff --git a/tools/test_apps/protocols/mqtt/publish_connect_test/ca.der b/tools/test_apps/protocols/mqtt/publish_connect_test/ca.der
index 3095392..8f0d120 100644
Binary files a/tools/test_apps/protocols/mqtt/publish_connect_test/ca.der and b/tools/test_apps/protocols/mqtt/publish_connect_test/ca.der differ