diff --git a/helpers/check-types.js b/helpers/check-types.js
index ef13e3b..6c9dc51 100644
--- a/helpers/check-types.js
+++ b/helpers/check-types.js
@@ -15,7 +15,11 @@ export function isValidHttpUrl( maybeUrl, allowUnsecure = false ) {
         return false
     }
 
-    return url.protocol === "http:" || url.protocol === "https:"
+    if ( allowUnsecure ) {
+        return url.protocol === "http:" || url.protocol === "https:"
+    }
+
+    return url.protocol === "https:"
 }
 
 export function isObject( maybeObject ) {