diff --git a/src/generators/json_api.cpp b/src/generators/json_api.cpp
index 0e24a1e..215c028 100644
--- a/src/generators/json_api.cpp
+++ b/src/generators/json_api.cpp
@@ -70,6 +70,8 @@ int main(int /*argc*/, char * /*argv*/[])
     using namespace FediBlock;
     using namespace FediBlock::json_api;
 
+    cout << "Content-Type: application/json\r\n\r\n";
+
     git::init(true);
 
     bool remove_lockfile{false};