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-rw-r--r--asterisk/Dockerfile3
1 files changed, 2 insertions, 1 deletions
diff --git a/asterisk/Dockerfile b/asterisk/Dockerfile
index 8486a55..d599222 100644
--- a/asterisk/Dockerfile
+++ b/asterisk/Dockerfile
@@ -1,4 +1,5 @@
-FROM alpine
+ARG ALPINE_VERSION="3.21"
+FROM alpine:${ALPINE_VERSION}
# install packages
RUN apk add --no-cache tini asterisk