diff --git a/src/web_service/telemetry_json.cpp b/src/web_service/telemetry_json.cpp
index b24e806a8..3c5590054 100644
--- a/src/web_service/telemetry_json.cpp
+++ b/src/web_service/telemetry_json.cpp
@@ -2,93 +2,113 @@
 // Licensed under GPLv2 or any later version
 // Refer to the license.txt file included.
 
+#include <json.hpp>
 #include "common/detached_tasks.h"
 #include "web_service/telemetry_json.h"
 #include "web_service/web_backend.h"
 
 namespace WebService {
 
+struct TelemetryJson::Impl {
+    Impl(std::string host, std::string username, std::string token)
+        : host{std::move(host)}, username{std::move(username)}, token{std::move(token)} {}
+
+    nlohmann::json& TopSection() {
+        return sections[static_cast<u8>(Telemetry::FieldType::None)];
+    }
+
+    const nlohmann::json& TopSection() const {
+        return sections[static_cast<u8>(Telemetry::FieldType::None)];
+    }
+
+    template <class T>
+    void Serialize(Telemetry::FieldType type, const std::string& name, T value) {
+        sections[static_cast<u8>(type)][name] = value;
+    }
+
+    void SerializeSection(Telemetry::FieldType type, const std::string& name) {
+        TopSection()[name] = sections[static_cast<unsigned>(type)];
+    }
+
+    nlohmann::json output;
+    std::array<nlohmann::json, 7> sections;
+    std::string host;
+    std::string username;
+    std::string token;
+};
+
 TelemetryJson::TelemetryJson(std::string host, std::string username, std::string token)
-    : host(std::move(host)), username(std::move(username)), token(std::move(token)) {}
+    : impl{std::make_unique<Impl>(std::move(host), std::move(username), std::move(token))} {}
 TelemetryJson::~TelemetryJson() = default;
 
-template <class T>
-void TelemetryJson::Serialize(Telemetry::FieldType type, const std::string& name, T value) {
-    sections[static_cast<u8>(type)][name] = value;
-}
-
-void TelemetryJson::SerializeSection(Telemetry::FieldType type, const std::string& name) {
-    TopSection()[name] = sections[static_cast<unsigned>(type)];
-}
-
 void TelemetryJson::Visit(const Telemetry::Field<bool>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<double>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<float>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<u8>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<u16>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<u32>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<u64>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<s8>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<s16>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<s32>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<s64>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<std::string>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue());
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<const char*>& field) {
-    Serialize(field.GetType(), field.GetName(), std::string(field.GetValue()));
+    impl->Serialize(field.GetType(), field.GetName(), std::string(field.GetValue()));
 }
 
 void TelemetryJson::Visit(const Telemetry::Field<std::chrono::microseconds>& field) {
-    Serialize(field.GetType(), field.GetName(), field.GetValue().count());
+    impl->Serialize(field.GetType(), field.GetName(), field.GetValue().count());
 }
 
 void TelemetryJson::Complete() {
-    SerializeSection(Telemetry::FieldType::App, "App");
-    SerializeSection(Telemetry::FieldType::Session, "Session");
-    SerializeSection(Telemetry::FieldType::Performance, "Performance");
-    SerializeSection(Telemetry::FieldType::UserFeedback, "UserFeedback");
-    SerializeSection(Telemetry::FieldType::UserConfig, "UserConfig");
-    SerializeSection(Telemetry::FieldType::UserSystem, "UserSystem");
+    impl->SerializeSection(Telemetry::FieldType::App, "App");
+    impl->SerializeSection(Telemetry::FieldType::Session, "Session");
+    impl->SerializeSection(Telemetry::FieldType::Performance, "Performance");
+    impl->SerializeSection(Telemetry::FieldType::UserFeedback, "UserFeedback");
+    impl->SerializeSection(Telemetry::FieldType::UserConfig, "UserConfig");
+    impl->SerializeSection(Telemetry::FieldType::UserSystem, "UserSystem");
 
-    auto content = TopSection().dump();
+    auto content = impl->TopSection().dump();
     // Send the telemetry async but don't handle the errors since they were written to the log
     Common::DetachedTasks::AddTask(
-        [host{this->host}, username{this->username}, token{this->token}, content]() {
+        [host{impl->host}, username{impl->username}, token{impl->token}, content]() {
             Client{host, username, token}.PostJson("/telemetry", content, true);
         });
 }
diff --git a/src/web_service/telemetry_json.h b/src/web_service/telemetry_json.h
index 361243649..4b4bef3bc 100644
--- a/src/web_service/telemetry_json.h
+++ b/src/web_service/telemetry_json.h
@@ -4,10 +4,8 @@
 
 #pragma once
 
-#include <array>
 #include <chrono>
 #include <string>
-#include <json.hpp>
 #include "common/announce_multiplayer_room.h"
 #include "common/telemetry.h"
 
@@ -40,20 +38,8 @@ public:
     void Complete() override;
 
 private:
-    nlohmann::json& TopSection() {
-        return sections[static_cast<u8>(Telemetry::FieldType::None)];
-    }
-
-    template <class T>
-    void Serialize(Telemetry::FieldType type, const std::string& name, T value);
-
-    void SerializeSection(Telemetry::FieldType type, const std::string& name);
-
-    nlohmann::json output;
-    std::array<nlohmann::json, 7> sections;
-    std::string host;
-    std::string username;
-    std::string token;
+    struct Impl;
+    std::unique_ptr<Impl> impl;
 };
 
 } // namespace WebService