diff --git a/README.md b/README.md
index 1ad92b0..3656f9d 100644
--- a/README.md
+++ b/README.md
@@ -52,10 +52,10 @@ Received file written to README.md
 ```$ pip install magic-wormhole```
 
 On Debian/Ubuntu systems, you may first need `apt-get install python-pip
-build-essential python-dev libffi-dev`. On Fedora it's `python-devel`
-and `libffi-devel`. On OS-X, you may need to install `pip` and run
-`xcode-select --install` to get GCC. Note: on Windows, only python2 is
-currently supported.
+build-essential python-dev libffi-dev libssl-dev`. On Fedora it's
+`python-devel` and `libffi-devel`. On OS-X, you may need to install `pip` and
+run `xcode-select --install` to get GCC. Note: on Windows, python2 may work
+better than python3.
 
 If you get errors like `fatal error: sodium.h: No such file or directory` on
 Linux, either use `SODIUM_INSTALL=bundled pip install magic-wormhole`, or try