diff --git a/app/app/public/404.html b/app/app/public/404.html
index da02d31..4b79df3 100644
--- a/app/app/public/404.html
+++ b/app/app/public/404.html
@@ -8,7 +8,7 @@
     <meta name="HandheldFriendly" content="true" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Rainfall Erosivity Factor Calculator | US EPA | US EPA</title>
-
+    <base href="/" />
     <link rel="canonical" href="https://lew.epa.gov/400.html" />
     <link rel="shortlink" href="https://lew.epa.gov/400.html" />
     <meta
diff --git a/app/app/public/500.html b/app/app/public/500.html
index 5a4c830..5d9e12b 100644
--- a/app/app/public/500.html
+++ b/app/app/public/500.html
@@ -8,7 +8,7 @@
     <meta name="HandheldFriendly" content="true" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>Rainfall Erosivity Factor Calculator | US EPA | US EPA</title>
-
+    <base href="/" />
     <link rel="canonical" href="https://lew.epa.gov/500.html" />
     <link rel="shortlink" href="https://lew.epa.gov/500.html" />
     <meta