diff --git a/src/util/json/array.cpp b/src/util/json/array.cpp
new file mode 100644
index 0000000..50e46a2
--- /dev/null
+++ b/src/util/json/array.cpp
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "util/json/array.h"
+#include "util/json/value.h"
+
+namespace Json {
+
+void Array::emplace_back(Value value)
+{
+	m_values.emplace_back(std::move(value));
+}
+
+Value& Array::at(size_t index)
+{
+	if (index + 1 > m_values.size()) {
+		m_values.resize(index + 1);
+	}
+
+	return m_values.at(index);
+}
+
+} // namespace Json
diff --git a/src/util/json/array.h b/src/util/json/array.h
index a22e807..b59c84a 100644
--- a/src/util/json/array.h
+++ b/src/util/json/array.h
@@ -12,10 +12,11 @@
 #include <vector>
 
 #include "util/json/parser.h"
-#include "util/json/value.h"
 
 namespace Json {
 
+class Value;
+
 class Array {
 public:
 	Array() {}
@@ -30,19 +31,9 @@ public:
 	{
 	}
 
-	void emplace_back(Value value)
-	{
-		m_values.emplace_back(std::move(value));
-	}
-
-	Value& at(size_t index)
-	{
-		if (index + 1 > m_values.size()) {
-			m_values.resize(index + 1);
-		}
+	void emplace_back(Value value);
 
-		return m_values.at(index);
-	}
+	Value& at(size_t index);
 	Value& operator[](size_t index) { return at(index); }
 	const Value& at(size_t index) const { return m_values.at(index); }
 	const Value& operator[](size_t index) const { return m_values.at(index); }
diff --git a/src/util/json/object.cpp b/src/util/json/object.cpp
new file mode 100644
index 0000000..8612897
--- /dev/null
+++ b/src/util/json/object.cpp
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2022 Riyyi
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include "util/json/object.h"
+#include "util/json/value.h"
+
+namespace Json {
+
+void Object::emplace(const std::string& name, Value value)
+{
+	m_members.emplace(name, std::move(value));
+}
+
+Value& Object::at(const std::string& name)
+{
+	if (m_members.find(name) == m_members.end()) {
+		emplace(name, {});
+	}
+
+	return m_members.at(name);
+}
+
+} // namespace Json
diff --git a/src/util/json/object.h b/src/util/json/object.h
index d8bf27f..71538ba 100644
--- a/src/util/json/object.h
+++ b/src/util/json/object.h
@@ -12,10 +12,11 @@
 #include <utility> // move
 
 #include "util/json/parser.h"
-#include "util/json/value.h"
 
 namespace Json {
 
+class Value;
+
 class Object {
 public:
 	Object() {}
@@ -26,19 +27,9 @@ public:
 	{
 	}
 
-	void emplace(const std::string& name, Value value)
-	{
-		m_members.emplace(name, std::move(value));
-	}
-
-	Value& at(const std::string& name)
-	{
-		if (m_members.find(name) == m_members.end()) {
-			emplace(name, {});
-		}
+	void emplace(const std::string& name, Value value);
 
-		return m_members.at(name);
-	}
+	Value& at(const std::string& name);
 	Value& operator[](const std::string& name) { return at(name); }
 	const Value& at(const std::string& name) const { return m_members.at(name); }
 	const Value& operator[](const std::string& name) const { return m_members.at(name); }