diff --git a/_config.yaml b/_config.yaml
index 697342d1..37392046 100644
--- a/_config.yaml
+++ b/_config.yaml
@@ -10,3 +10,4 @@ defaults:
       layout: "page"
 
 exclude: ["README.md"]
+include: ["_headers"]
diff --git a/_headers b/_headers
new file mode 100644
index 00000000..e913c495
--- /dev/null
+++ b/_headers
@@ -0,0 +1,5 @@
+/*
+  X-Frame-Options: DENY
+  X-Content-Type-Options: nosniff
+  Referrer-Policy: no-referrer
+  Content-Security-Policy: default-src 'none'; style-src-elem 'self'; font-src 'self'; img-src 'self'; manifest-src 'self'; form-action 'none'; frame-ancestors 'none'; base-uri 'none'; sandbox; upgrade-insecure-requests;