diff --git a/docs/voices.md b/docs/voices.md
index 79466c5a..84e90c23 100644
--- a/docs/voices.md
+++ b/docs/voices.md
@@ -25,9 +25,9 @@
   - [dictionary](#dictionary)
   - [dictrules](#dictrules)
   - [replace](#replace)
-  - [stressLength](#stressLength)
-  - [stressAdd](#stressAdd)
-  - [stressAmp](#stressAmp)
+  - [stressLength](#stresslength)
+  - [stressAdd](#stressadd)
+  - [stressAmp](#stressamp)
   - [intonation](#intonation)
   - [charset](#charset)
   - [dictmin](#dictmin)