diff --git a/lib/config/environment.js b/lib/config/environment.js
index 4a1621dd..cbf0f4c1 100644
--- a/lib/config/environment.js
+++ b/lib/config/environment.js
@@ -148,5 +148,5 @@ module.exports = {
   defaultUseHardbreak: toBooleanConfig(process.env.CMD_DEFAULT_USE_HARD_BREAK),
   linkifyHeaderStyle: process.env.CMD_LINKIFY_HEADER_STYLE,
   autoVersionCheck: toBooleanConfig(process.env.CMD_AUTO_VERSION_CHECK),
-  defaultTocDepth: toIntegerConfig(process.env.CMD_DEFAULT_TOC_DEPTH, 3)
+  defaultTocDepth: toIntegerConfig(process.env.CMD_DEFAULT_TOC_DEPTH)
 }