diff --git a/gts/src/RequireCss.cs b/gts/src/RequireCss.cs
index 81e81a1b..b6642f7d 100644
--- a/gts/src/RequireCss.cs
+++ b/gts/src/RequireCss.cs
@@ -22,5 +22,19 @@ namespace PkmnFoundations.Web
         }
 
         public String CssUrl { get; set; }
+
+        public override string Key
+        {
+            get
+            {
+                if (base.Key != null)
+                    return base.Key;
+                return CssUrl;
+            }
+            set
+            {
+                base.Key = value;
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/gts/src/RequireLinkBase.cs b/gts/src/RequireLinkBase.cs
index 79bc5f94..529cc8a5 100644
--- a/gts/src/RequireLinkBase.cs
+++ b/gts/src/RequireLinkBase.cs
@@ -47,7 +47,7 @@ namespace PkmnFoundations.Web
             }
         }
 
-        public String Key { get; set; }
+        public virtual String Key { get; set; }
         public String After { get; set; }
 
         public abstract void RenderHeader(System.Web.UI.HtmlTextWriter writer);
diff --git a/gts/src/RequireScript.cs b/gts/src/RequireScript.cs
index d2bb7e1b..ff32efac 100644
--- a/gts/src/RequireScript.cs
+++ b/gts/src/RequireScript.cs
@@ -22,5 +22,19 @@ namespace PkmnFoundations.Web
 
         public String ScriptUrl { get; set; }
         public String Type { get; set; }
+
+        public override string Key
+        {
+            get
+            {
+                if (base.Key != null)
+                    return base.Key;
+                return ScriptUrl;
+            }
+            set
+            {
+                base.Key = value;
+            }
+        }
     }
 }
\ No newline at end of file