diff --git a/collectd/Dockerfile b/collectd/Dockerfile
index ab25b87..0865dbf 100644
--- a/collectd/Dockerfile
+++ b/collectd/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:latest
+FROM alpine:3.15
 
 RUN apk --no-cache add collectd collectd-python collectd-network tzdata \
                        py3-pip gettext && \