diff --git a/guides/source/security.md b/guides/source/security.md
index bb09696a325..33367f04ff5 100644
--- a/guides/source/security.md
+++ b/guides/source/security.md
@@ -19,7 +19,7 @@ After reading this guide, you will know:
 Introduction
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-Web application frameworks are made to help developers build web applications. Some of them also help you with securing the web application. In fact one framework is not more secure than another: If you use it correctly, you will be able to build secure apps with many frameworks. Ruby on Rails has some clever helper methods, for example against SQL injection, so that this is hardly a problem.
+Web application frameworks are made to help developers build web applications. Some of them also help you with securing the web application. In fact one framework is not more secure than another: If you use it correctly, you will be able to build secure apps with many frameworks. Ruby on Rails has some clever helper methods, for example against SQL injection, so this is hardly a problem.
 
 In general there is no such thing as plug-n-play security. Security depends on the people using the framework, and sometimes on the development method. And it depends on all layers of a web application environment: The back-end storage, the web server, and the web application itself (and possibly other layers or applications).