diff --git a/src/lib/env.js b/src/lib/env.js
index fbb26bc..6de81b2 100644
--- a/src/lib/env.js
+++ b/src/lib/env.js
@@ -40,6 +40,14 @@ module.exports = function envFactory() {
     return newContext;
   }
 
+  function aliasesDeprecationNotice() {
+    if (aliasesDeprecationNotice.called) {
+      return;
+    }
+    console.warn('$aliases is deprecated and will be removed in common-env v7. More info at http://bit.ly/2bRSMN3');
+    aliasesDeprecationNotice.called = true;
+  }
+
   function getOrElseAll(object, topContext) {
     topContext = topContext || createContext();
 
@@ -131,6 +139,8 @@ module.exports = function envFactory() {
     }
     if (_.isUndefined(config.$aliases)) {
       config.$aliases = [];
+    } else {
+      aliasesDeprecationNotice();
     }
 
     // if `$type` is specified it will be used as a type checker and converter, otherwise infer the type from ``$default`