diff --git a/files_reader/appinfo/app.php b/files_reader/appinfo/app.php
index 34ccfca..d28cac0 100644
--- a/files_reader/appinfo/app.php
+++ b/files_reader/appinfo/app.php
@@ -15,3 +15,16 @@ namespace OCA\Files_Reader\AppInfo;
use OCP\Util;
Util::addscript( 'files_reader', 'plugin');
+
+if(class_exists('\\OCP\\AppFramework\\Http\\EmptyContentSecurityPolicy')) {
+ $manager = \OC::$server->getContentSecurityPolicyManager();
+ $csp = new \OCP\AppFramework\Http\EmptyContentSecurityPolicy();
+ $csp->addAllowedStyleDomain('\'self\'');
+ $csp->addAllowedStyleDomain('blob:');
+ $csp->addAllowedScriptDomain('\'self\'');
+ $csp->addAllowedFrameDomain('\'self\'');
+ $csp->addAllowedChildSrcDomain('\'self\'');
+ $csp->addAllowedImageDomain('blob:');
+ $manager->addDefaultPolicy($csp);
+}
+
diff --git a/files_reader/appinfo/info.xml b/files_reader/appinfo/info.xml
index 89fcab9..913c6f8 100644
--- a/files_reader/appinfo/info.xml
+++ b/files_reader/appinfo/info.xml
@@ -11,7 +11,7 @@
Also in Settings you'll find the option to use ignore any internal formatting in the book by forcing a given font style and size.
-