diff --git a/nginx/snippets/security-headers.conf b/nginx/snippets/security-headers.conf
index 27101d1..452cb06 100644
--- a/nginx/snippets/security-headers.conf
+++ b/nginx/snippets/security-headers.conf
@@ -5,8 +5,5 @@ add_header Cross-Origin-Opener-Policy "same-origin" always;
 add_header Cross-Origin-Embedder-Policy "require-corp" always;
 add_header Origin-Agent-Cluster "?1" always;
 
-# obsolete when client system time is correct
-add_header Expect-CT "enforce, max-age=63072000" always;
-
 # obsolete, unsafe and replaced with strong Content-Security-Policy
 add_header X-XSS-Protection "0" always;