diff --git a/docs/source/contributing.rst b/docs/source/contributing.rst
index a08bd4c7d..e884d8547 100644
--- a/docs/source/contributing.rst
+++ b/docs/source/contributing.rst
@@ -70,7 +70,7 @@ a good idea to write the blueprint first so you don't end up writing a bunch
 of code that may not go in the direction the community wants.
 
 For bugs, open the bug first, but if you can reproduce the bug reliably and
-identify it's cause then it's usually safe to start working on it. However,
+identify its cause then it's usually safe to start working on it. However,
 getting independent confirmation (and verifying that it's not a duplicate)
 is always a good idea if you can be patient.
 
diff --git a/docs/source/index.rst b/docs/source/index.rst
index b899797ce..0c199c01c 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -76,7 +76,7 @@ the following topic guides.
 API Reference
 -------------
 
-In-depth documentation for Horizon and it's APIs.
+In-depth documentation for Horizon and its APIs.
 
 .. toctree::
    :maxdepth: 1
diff --git a/docs/source/intro.rst b/docs/source/intro.rst
index 83f7819fd..a546ce991 100644
--- a/docs/source/intro.rst
+++ b/docs/source/intro.rst
@@ -14,7 +14,7 @@ Values
 
     -- Frank Lloyd Wright
 
-Horizon holds several key values at the core of it's design and architecture:
+Horizon holds several key values at the core of its design and architecture:
 
     * Core Support: Out-of-the-box support for all core OpenStack projects.
     * Extensible: Anyone can add a new component as a "first-class citizen".
@@ -48,8 +48,8 @@ modular future.
 The Current Architecture & How It Meets Our Values
 ==================================================
 
-At it's core, **Horizon should be a registration pattern for
-applications to hook into**. Here's what that means and how it's
+At its core, **Horizon should be a registration pattern for
+applications to hook into**. Here's what that means and how it is
 implemented in terms of our values:
 
 Core Support
diff --git a/docs/source/topics/testing.rst b/docs/source/topics/testing.rst
index 36aada601..5c36ac824 100644
--- a/docs/source/topics/testing.rst
+++ b/docs/source/topics/testing.rst
@@ -242,7 +242,7 @@ Some common things to look for:
 Understanding the output from ``mox``
 -------------------------------------
 
-Horizon uses ``mox`` as it's mocking framework of choice, and while it
+Horizon uses ``mox`` as its mocking framework of choice, and while it
 offers many nice features, its output when a test fails can be quite
 mysterious.