diff --git a/Dockerfile b/Dockerfile
index 43032de..76153b8 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3.21.2 AS builder
+FROM alpine:3.21.3 AS builder
 
 RUN apk add --no-cache \
 	libstdc++=14.2.0-r4 \
@@ -16,7 +16,7 @@ COPY *.cpp *.hpp Makefile ./
 
 RUN make -j "$(nproc)"
 
-FROM alpine:3.21.2
+FROM alpine:3.21.3
 
 RUN apk add --no-cache \
 	libstdc++=14.2.0-r4 \