diff --git a/README.md b/README.md
index 37f28e086..918dfb5ff 100644
--- a/README.md
+++ b/README.md
@@ -51,7 +51,7 @@ Run the app locally:
 bin/rails s
 ```
 
-Prerequisites for testing: install PhantomJS >= 1.9.8
+Prerequisites for testing: install PhantomJS >= 2.1.1
 
 Run the tests with:
 
diff --git a/README_ES.md b/README_ES.md
index 81a7ba465..4bb11f58e 100644
--- a/README_ES.md
+++ b/README_ES.md
@@ -51,7 +51,7 @@ Para ejecutar la aplicación en local:
 bin/rails s
 ```
 
-Prerequisitos para los tests: tener instalado PhantomJS >= 1.9.8
+Prerequisitos para los tests: tener instalado PhantomJS >= 2.1.1
 
 Para ejecutar los tests: