diff --git a/include/opendht/dht_proxy_server.h b/include/opendht/dht_proxy_server.h
index 926d6477..44dd8719 100644
--- a/include/opendht/dht_proxy_server.h
+++ b/include/opendht/dht_proxy_server.h
@@ -149,44 +149,12 @@ public:
         /** Node Info **/
         std::shared_ptr<NodeInfo> nodeInfo {};
 
-        std::string toString() const {
-            auto ret = fmt::format("Listens: {}, Puts: {}, PushListeners: {}\n"
-                        "Push requests in the last {}: [Android: {}], [iOS: {}], [Unified: {}]\n"
-                        "Requests: {} per second.",
-                        listenCount, putCount, pushListenersCount,
-                        print_duration(lastUpdated - serverStartTime),
-                        androidPush.toString(), iosPush.toString(), unifiedPush.toString(),
-                        requestRate);
-            if (nodeInfo) {
-                auto& ipv4 = nodeInfo->ipv4;
-                if (ipv4.table_depth > 1)
-                    ret += fmt::format("IPv4 Network estimation: {}\n", ipv4.getNetworkSizeEstimation());
-                auto& ipv6 = nodeInfo->ipv6;
-                if (ipv6.table_depth > 1)
-                    ret += fmt::format("IPv6 Network estimation: {}\n", ipv6.getNetworkSizeEstimation());
-            }
-            return ret;
-        }
+        std::string toString() const;
 
         /**
          * Build a json object from a NodeStats
          */
-        Json::Value toJson() const {
-            Json::Value result;
-            result["listenCount"] = static_cast<Json::UInt64>(listenCount);
-            result["putCount"] = static_cast<Json::UInt64>(putCount);
-            result["totalPermanentPuts"] = static_cast<Json::UInt64>(totalPermanentPuts);
-            result["pushListenersCount"] = static_cast<Json::UInt64>(pushListenersCount);
-            result["serverStartTime"] = static_cast<Json::LargestInt>(to_time_t(serverStartTime));
-            result["lastUpdated"] = static_cast<Json::LargestInt>(to_time_t(lastUpdated));
-            result["androidPush"] = androidPush.toJson();
-            result["iosPush"] = iosPush.toJson();
-            result["unifiedPush"] = unifiedPush.toJson();
-            result["requestRate"] = requestRate;
-            if (nodeInfo)
-                result["nodeInfo"] = nodeInfo->toJson();
-            return result;
-        }
+        Json::Value toJson() const;
     };
 
     std::shared_ptr<ServerStats> stats() const { return stats_; }
diff --git a/src/dht_proxy_server.cpp b/src/dht_proxy_server.cpp
index 137b029c..659407e2 100644
--- a/src/dht_proxy_server.cpp
+++ b/src/dht_proxy_server.cpp
@@ -100,6 +100,47 @@ private:
     std::shared_ptr<Logger> m_logger;
 };
 
+
+std::string
+DhtProxyServer::ServerStats::toString() const
+{
+    auto ret = fmt::format("Listens: {}, Puts: {}, PushListeners: {}\n"
+                "Push requests in the last {}: [Android: {}], [iOS: {}], [Unified: {}]\n"
+                "Requests: {} per second.",
+                listenCount, putCount, pushListenersCount,
+                print_duration(lastUpdated - serverStartTime),
+                androidPush.toString(), iosPush.toString(), unifiedPush.toString(),
+                requestRate);
+    if (nodeInfo) {
+        auto& ipv4 = nodeInfo->ipv4;
+        if (ipv4.table_depth > 1)
+            ret += fmt::format("IPv4 Network estimation: {}\n", ipv4.getNetworkSizeEstimation());
+        auto& ipv6 = nodeInfo->ipv6;
+        if (ipv6.table_depth > 1)
+            ret += fmt::format("IPv6 Network estimation: {}\n", ipv6.getNetworkSizeEstimation());
+    }
+    return ret;
+}
+
+Json::Value
+DhtProxyServer::ServerStats::toJson() const
+{
+    Json::Value result;
+    result["listenCount"] = static_cast<Json::UInt64>(listenCount);
+    result["putCount"] = static_cast<Json::UInt64>(putCount);
+    result["totalPermanentPuts"] = static_cast<Json::UInt64>(totalPermanentPuts);
+    result["pushListenersCount"] = static_cast<Json::UInt64>(pushListenersCount);
+    result["serverStartTime"] = static_cast<Json::LargestInt>(to_time_t(serverStartTime));
+    result["lastUpdated"] = static_cast<Json::LargestInt>(to_time_t(lastUpdated));
+    result["androidPush"] = androidPush.toJson();
+    result["iosPush"] = iosPush.toJson();
+    result["unifiedPush"] = unifiedPush.toJson();
+    result["requestRate"] = requestRate;
+    if (nodeInfo)
+        result["nodeInfo"] = nodeInfo->toJson();
+    return result;
+}
+
 restinio::request_handling_status_t
 DhtProxyServer::serverError(restinio::request_t& request) {
     auto response = initHttpResponse(request.create_response(restinio::status_internal_server_error()));