diff --git a/Dockerfile b/Dockerfile
index adc0ee2..643f648 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,5 +1,5 @@
 ARG ALPINE_IMAGE=alpine
-ARG ALPINE_VERSION=3.14
+ARG ALPINE_VERSION=3.15
 ARG ZT_COMMIT=eac56a2e25bbd27f77505cbd0c21b86abdfbd36b
 ARG ZT_VERSION=1.8.4