Error Installing Ionic On Windows

I have node, npm, and cordova installed on a Windows 7 box. However, when I run

npm install -g ionic

I receive the following error:

C:\Users\me>npm install -g ionic
loadRequestedDeps → after ▌ ╢███████████████████████████░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░░╟
Assertion failed: ctx->mode_ != NONE && "already finalized", file src\node_zlib.cc, line 147


C:\Users\me>node -v
v0.12.5

C:\Users\me>npm -v
3.0.0

C:\Users\me>cordova -v
5.1.1

What can I do to fix this error?