diff --git a/docker_requirements.txt b/docker_requirements.txt
index 7b4ba1023..3a8672806 100644
--- a/docker_requirements.txt
+++ b/docker_requirements.txt
@@ -16,7 +16,7 @@ nltk==3.6.6
 numpy==1.26.*
 OSKut==1.3
 pandas==1.4.*
-panphon==0.20.0
+panphon==0.21.2
 phunspell==0.1.6
 protobuf==3.20.3
 pyicu==2.8