diff --git a/cps/web.py b/cps/web.py
index 3166fe6f..fa12db5a 100644
--- a/cps/web.py
+++ b/cps/web.py
@@ -85,11 +85,11 @@ def add_security_headers(resp):
     csp += " 'unsafe-inline' 'unsafe-eval'; font-src 'self' data:; img-src 'self'"
     if request.path.startswith("/author/") and config.config_use_goodreads:
         csp += " images.gr-assets.com i.gr-assets.com s.gr-assets.com"
-    csp += " data:;"
+    csp += " data:"
     if request.endpoint == "edit-book.show_edit_book" or config.config_use_google_drive:
         csp += " *;"
     elif request.endpoint == "web.read_book":
-        csp += " style-src-elem 'self' blob: 'unsafe-inline';"
+        csp += " blob:; style-src-elem 'self' blob: 'unsafe-inline';"
     else:
         csp += ";"
     csp += " object-src 'none';"