diff --git a/LibHTML/CSS/StyleDeclaration.cpp b/LibHTML/CSS/StyleDeclaration.cpp
index 187c6ab766..cc550e2622 100644
--- a/LibHTML/CSS/StyleDeclaration.cpp
+++ b/LibHTML/CSS/StyleDeclaration.cpp
@@ -1,6 +1,8 @@
 #include <LibHTML/CSS/StyleDeclaration.h>
 
-StyleDeclaration::StyleDeclaration()
+StyleDeclaration::StyleDeclaration(const String& property_name, NonnullRefPtr<StyleValue>&& value)
+    : m_property_name(property_name)
+    , m_value(move(value))
 {
 }
 
diff --git a/LibHTML/CSS/StyleDeclaration.h b/LibHTML/CSS/StyleDeclaration.h
index b93769e193..b9e3291838 100644
--- a/LibHTML/CSS/StyleDeclaration.h
+++ b/LibHTML/CSS/StyleDeclaration.h
@@ -3,15 +3,21 @@
 #include <AK/AKString.h>
 #include <LibHTML/CSS/StyleValue.h>
 
-class StyleDeclaration {
+class StyleDeclaration : public RefCounted<StyleDeclaration> {
 public:
-    StyleDeclaration();
+    NonnullRefPtr<StyleDeclaration> create(const String& property_name, NonnullRefPtr<StyleValue>&& value)
+    {
+        return adopt(*new StyleDeclaration(property_name, move(value)));
+    }
+
     ~StyleDeclaration();
 
     const String& property_name() const { return m_property_name; }
     const StyleValue& value() const { return *m_value; }
 
 public:
+    StyleDeclaration(const String& property_name, NonnullRefPtr<StyleValue>&&);
+
     String m_property_name;
-    RefPtr<StyleValue> m_value;
+    NonnullRefPtr<StyleValue> m_value;
 };
diff --git a/LibHTML/CSS/StyleRule.cpp b/LibHTML/CSS/StyleRule.cpp
index e69de29bb2..f8688b9630 100644
--- a/LibHTML/CSS/StyleRule.cpp
+++ b/LibHTML/CSS/StyleRule.cpp
@@ -0,0 +1,8 @@
+#include <LibHTML/CSS/StyleRule.h>
+
+StyleRule::StyleRule(Vector<Selector>&& selectors, Vector<NonnullRefPtr<StyleDeclaration>>&& declarations)
+    : m_selectors(move(selectors))
+    , m_declarations(move(declarations))
+{
+
+}
diff --git a/LibHTML/CSS/StyleRule.h b/LibHTML/CSS/StyleRule.h
index 657d851d95..e4377b8053 100644
--- a/LibHTML/CSS/StyleRule.h
+++ b/LibHTML/CSS/StyleRule.h
@@ -4,12 +4,18 @@
 #include <LibHTML/CSS/Selector.h>
 #include <LibHTML/CSS/StyleDeclaration.h>
 
-class StyleRule {
+class StyleRule : public RefCounted<StyleRule> {
 public:
-    StyleRule();
+    NonnullRefPtr<StyleRule> create(Vector<Selector>&& selectors, Vector<NonnullRefPtr<StyleDeclaration>>&& declarations)
+    {
+        return adopt(*new StyleRule(move(selectors), move(declarations)));
+    }
+
     ~StyleRule();
 
 private:
+    StyleRule(Vector<Selector>&&, Vector<NonnullRefPtr<StyleDeclaration>>&&);
+
     Vector<Selector> m_selectors;
-    Vector<StyleDeclaration> m_declarations;
+    Vector<NonnullRefPtr<StyleDeclaration>> m_declarations;
 };
diff --git a/LibHTML/CSS/StyleSheet.cpp b/LibHTML/CSS/StyleSheet.cpp
index 840b46835b..58064325ed 100644
--- a/LibHTML/CSS/StyleSheet.cpp
+++ b/LibHTML/CSS/StyleSheet.cpp
@@ -1,6 +1,7 @@
 #include <LibHTML/CSS/StyleSheet.h>
 
-StyleSheet::StyleSheet()
+StyleSheet::StyleSheet(Vector<NonnullRefPtr<StyleRule>>&& rules)
+    : m_rules(move(rules))
 {
 }
 
diff --git a/LibHTML/CSS/StyleSheet.h b/LibHTML/CSS/StyleSheet.h
index 7089b59e67..3a48e3a563 100644
--- a/LibHTML/CSS/StyleSheet.h
+++ b/LibHTML/CSS/StyleSheet.h
@@ -3,13 +3,19 @@
 #include <AK/Vector.h>
 #include <LibHTML/CSS/StyleRule.h>
 
-class StyleSheet {
+class StyleSheet : public RefCounted<StyleSheet> {
 public:
-    StyleSheet();
+    NonnullRefPtr<StyleSheet> create(Vector<NonnullRefPtr<StyleRule>>&& rules)
+    {
+        return adopt(*new StyleSheet(move(rules)));
+    }
+
     ~StyleSheet();
 
-    const Vector<StyleRule>& rules() const { return m_rules; }
+    const Vector<NonnullRefPtr<StyleRule>>& rules() const { return m_rules; }
 
 private:
-    Vector<StyleRule> m_rules;
+    explicit StyleSheet(Vector<NonnullRefPtr<StyleRule>>&&);
+
+    Vector<NonnullRefPtr<StyleRule>> m_rules;
 };