diff --git a/README.md b/README.md
index 9faa12d..e671520 100644
--- a/README.md
+++ b/README.md
@@ -4,19 +4,19 @@ More thorough docs are available at [http://jparyani.github.io/pycapnp/](http://
 
 ## Requirements
 
-First you need a system-wide installation of the Cap'n Proto C++ library == 0.4.x. Follow the [official installation docs](http://kentonv.github.io/capnproto/install.html) or for the lazy:
+First you need a system-wide installation of the Cap'n Proto C++ library == 0.5.x. Follow the [official installation docs](http://kentonv.github.io/capnproto/install.html) or for the lazy:
 
 ```bash
-curl -O http://capnproto.org/capnproto-c++-0.4.0.tar.gz
-tar zxf capnproto-c++-0.4.0.tar.gz
-cd capnproto-c++-0.4.0
+curl -O http://capnproto.org/capnproto-c++-0.5.0.tar.gz
+tar zxf capnproto-c++-0.5.0.tar.gz
+cd capnproto-c++-0.5.0
 ./configure
 make -j6 check
 sudo make install
 ```
 
 A recent version of cython and setuptools is also required. You can install these with:
-    
+
 ```bash
 pip install -U cython
 pip install -U setuptools
diff --git a/docs/install.rst b/docs/install.rst
index 3981e8c..00abdb6 100644
--- a/docs/install.rst
+++ b/docs/install.rst
@@ -8,9 +8,9 @@ C++ Cap'n Proto Library
 
 You need to install the C++ Cap'n Proto library first. It requires a C++ compiler with C++11 support, such as GCC 4.7+ or Clang 3.2+. Follow installation docs at `http://kentonv.github.io/capnproto/install.html <http://kentonv.github.io/capnproto/install.html>`_, or if you're feeling lazy, you can run the commands below::
 
-    curl -O http://capnproto.org/capnproto-c++-0.4.0.tar.gz
-    tar zxf capnproto-c++-0.4.0.tar.gz
-    cd capnproto-c++-0.4.0
+    curl -O http://capnproto.org/capnproto-c++-0.5.0.tar.gz
+    tar zxf capnproto-c++-0.5.0.tar.gz
+    cd capnproto-c++-0.5.0
     ./configure
     make -j6 check
     sudo make install
@@ -19,7 +19,7 @@ Pip
 ---------------------
 
 Using pip is by far the easiest way to install the library. After you've installed the C++ library, all you need to run is::
-    
+
     [sudo] pip install -U cython
     [sudo] pip install -U setuptools
     [sudo] pip install pycapnp
@@ -47,7 +47,7 @@ Development
 -------------------
 
 Clone the repo from https://github.com/jparyani/pycapnp.git and use the `develop` branch. I'll probably ask you to redo pull requests that target `master` and aren't easily mergable to `develop`::
-    
+
     git clone https://github.com/jparyani/pycapnp.git
     git checkout develop