diff --git a/csrc/faster_eval_api/faster_eval_api.cpp b/csrc/faster_eval_api/faster_eval_api.cpp
index cddf8c1..e0ef991 100644
--- a/csrc/faster_eval_api/faster_eval_api.cpp
+++ b/csrc/faster_eval_api/faster_eval_api.cpp
@@ -57,7 +57,34 @@ namespace coco_eval
     pybind11::class_<COCOeval::InstanceAnnotation>(m, "InstanceAnnotation")
     .def(pybind11::init<uint64_t, double, double, bool, bool, bool>());
 
-    pybind11::class_<COCOeval::ImageEvaluation>(m, "ImageEvaluation").def(pybind11::init<>());
+    pybind11::class_<COCOeval::ImageEvaluation>(m, "ImageEvaluation").def(pybind11::init<>())
+    .def(py::pickle(
+        [](const COCOeval::ImageEvaluation &p) {
+
+            std::vector<std::tuple<uint64_t, uint64_t, double>> matched_annotations;
+            for (size_t i = 0; i < p.matched_annotations.size(); i++) {
+                matched_annotations.push_back(std::make_tuple(p.matched_annotations[i].dt_id, p.matched_annotations[i].gt_id, p.matched_annotations[i].iou));
+            }
+
+            return py::make_tuple(p.detection_matches, p.ground_truth_matches, p.detection_scores, p.ground_truth_ignores, p.detection_ignores, matched_annotations);
+        },
+        [](py::tuple t) { // __setstate__
+            if (t.size() != 6)
+                throw std::runtime_error("Invalid state!");
+
+            COCOeval::ImageEvaluation p;
+            p.detection_matches = t[0].cast<std::vector<int64_t>>();
+            p.ground_truth_matches = t[1].cast<std::vector<int64_t>>();
+            p.detection_scores = t[2].cast<std::vector<double>>();
+            p.ground_truth_ignores = t[3].cast<std::vector<bool>>();
+            p.detection_ignores = t[4].cast<std::vector<bool>>();
+            std::vector<std::tuple<uint64_t, uint64_t, double>> matched_annotations = t[5].cast<std::vector<std::tuple<uint64_t, uint64_t, double>>>();
+            for (size_t i = 0; i < matched_annotations.size(); i++) {
+                p.matched_annotations.emplace_back(std::get<0>(matched_annotations[i]), std::get<1>(matched_annotations[i]), std::get<2>(matched_annotations[i]));
+            }
+            return p;
+        }
+    ));
 
     pybind11::class_<COCOeval::Dataset>(m, "Dataset").def(pybind11::init<>())
     .def("append", &COCOeval::Dataset::append)
@@ -73,4 +100,4 @@ namespace coco_eval
 #endif
   }
 
-} // namespace coco_eval
+} // namespace coco_eval