diff --git a/docs/environment_variables.md b/docs/environment_variables.md
index 662761f..526dddd 100644
--- a/docs/environment_variables.md
+++ b/docs/environment_variables.md
@@ -12,6 +12,10 @@ You can set these in two ways:
 
 This variable is used by GotHub to check if you've completed setup or not. The GotHub setup wizard sets this to true for you. If it's empty, you will get a banner on GotHub's main page saying you haven't completed setup. Once you're done setting up GotHub, set this to true.
 
+### GOTHUB_PROXYING_ENABLED
+
+If you don't want to proxy non-essential things (ie. avatars, repo archives, raw files) through your instance, set this to false.
+
 ### GOTHUB_IP_LOGGED
 
 If you log IPs on your instance, set this to true. Otherwise, set it to false.
@@ -52,4 +56,4 @@ Port to run GotHub on. For example: ``GOTHUB_PORT=8080``. This gets overwritten
 
 ### GOTHUB_USER_AGENT
 
-User agent to use when making requests to GitHub. For example: ``GOTHUB_USER_AGENT=GotHub/1.0.0``. Set to Chrome on Windows 10 by default, optional.
\ No newline at end of file
+User agent to use when making requests to GitHub. For example: ``GOTHUB_USER_AGENT=GotHub/1.0.0``. Set to Chrome on Windows 10 by default, optional.