diff --git a/okapi.cpp b/okapi.cpp
index cf2b3b6..c83f2e0 100644
--- a/okapi.cpp
+++ b/okapi.cpp
@@ -153,7 +153,10 @@ Caches Okapi::get_caches(const std::set<std::string>& codes) const {
 		for (auto& el : j.items()) {
 			if (el.value().is_null()) continue;
 			c.code = el.value()["code"];
-			c.internal_id = el.value()["internal_id"];
+			if (el.value()["internal_id"].is_number())
+				c.internal_id = el.value()["internal_id"];
+			else
+				c.internal_id = std::stoi(el.value()["internal_id"].get<std::string>());
 			c.name = el.value()["name"];
 			c.type = el.value()["type"];
 			c.size = el.value()["size2"];