diff --git a/index-de.html b/index-de.html
index 75791ee..63b4058 100644
--- a/index-de.html
+++ b/index-de.html
@@ -727,7 +727,7 @@
platform of choice for many of the busiest web sites and most pervasive embedded
networking and storage devices.
OpenSD - The OpenBSD project produces a
+ rel="external nofollow noopener">OpenBSD - The OpenBSD project produces a
FREE, multi-platform 4.4BSD-based UNIX-like operating system. The efforts
emphasize portability, standardization, correctness, proactive security and
integrated cryptography. As an example of the effect OpenBSD has, the popular
diff --git a/index.html b/index.html
index c651968..0cf6400 100644
--- a/index.html
+++ b/index.html
@@ -726,7 +726,7 @@
platform of choice for many of the busiest web sites and most pervasive embedded
networking and storage devices.
OpenSD - The OpenBSD project produces a
+ rel="external nofollow noopener">OpenBSD - The OpenBSD project produces a
FREE, multi-platform 4.4BSD-based UNIX-like operating system. The efforts
emphasize portability, standardization, correctness, proactive security and
integrated cryptography. As an example of the effect OpenBSD has, the popular