diff --git a/src/application.cpp b/src/application.cpp
index 980af2d..41a8122 100644
--- a/src/application.cpp
+++ b/src/application.cpp
@@ -154,7 +154,7 @@ void GitApp::main(std::string url) {
     response().set_header(
         "Content-Security-Policy",
         "default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; "
-        "img-src 'self' data: https:; object-src 'none'; base-uri 'none'; "
+        "img-src 'self' data: http: https:; object-src 'none'; base-uri 'none'; "
         "frame-ancestors 'none'");
     response().set_header("X-Content-Type-Options", "nosniff");
     cppcms::application::main(url);