diff --git a/nginx/nginx.conf b/nginx/nginx.conf
index 94aa346..af1ba92 100644
--- a/nginx/nginx.conf
+++ b/nginx/nginx.conf
@@ -99,7 +99,7 @@ http {
 
         include snippets/security-headers.conf;
         add_header Cross-Origin-Resource-Policy "same-origin" always;
-        add_header Content-Security-Policy "font-src 'none'; script-src 'none'; style-src 'none'; frame-ancestors 'none'; block-all-mixed-content" always;
+        add_header Content-Security-Policy "font-src 'none'; manifest-src 'none'; object-src 'none'; script-src 'none'; style-src 'none'; frame-ancestors 'none'; block-all-mixed-content" always;
         # obsolete and replaced with Content-Security-Policy frame-ancestors 'none'
         add_header X-Frame-Options "DENY" always;
 
@@ -114,7 +114,7 @@ http {
 
             include snippets/security-headers.conf;
             add_header Cross-Origin-Resource-Policy "cross-origin" always;
-            add_header Content-Security-Policy "font-src 'none'; script-src 'none'; style-src 'none'; frame-ancestors 'none'; block-all-mixed-content" always;
+            add_header Content-Security-Policy "font-src 'none'; manifest-src 'none'; object-src 'none'; script-src 'none'; style-src 'none'; frame-ancestors 'none'; block-all-mixed-content" always;
             # obsolete and replaced with Content-Security-Policy frame-ancestors 'none'
             add_header X-Frame-Options "DENY" always;
             add_header X-Robots-Tag "none";
@@ -143,7 +143,7 @@ http {
 
         include snippets/security-headers.conf;
         add_header Cross-Origin-Resource-Policy "cross-origin" always;
-        add_header Content-Security-Policy "font-src 'self'; manifest-src 'self'; script-src 'self' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; frame-ancestors 'self'; block-all-mixed-content" always;
+        add_header Content-Security-Policy "font-src 'self'; manifest-src 'self'; object-src 'none'; script-src 'self' 'unsafe-eval'; style-src 'self' 'unsafe-inline'; frame-ancestors 'self'; block-all-mixed-content" always;
         # obsolete and replaced with Content-Security-Policy frame-ancestors 'self'
         add_header X-Frame-Options "SAMEORIGIN" always;
         add_header X-Robots-Tag "none";