diff --git a/Dockerfile b/Dockerfile
index 6f52044..0bfb6b7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,9 +1,12 @@
-FROM alpine:3.20.1 AS builder
+FROM alpine:3.20.3 AS builder
+
+RUN apk add --no-cache \
+	libstdc++=13.2.1_git20240309-r0 \
+	&& adduser --disabled-password saundersp
 
 RUN apk add --no-cache \
 	make=4.4.1-r2 \
-	g++=13.2.1_git20240309-r0 \
-	&& adduser --disabled-password saundersp
+	g++=13.2.1_git20240309-r0
 
 USER saundersp
 
@@ -13,7 +16,7 @@ COPY *.cpp *.hpp Makefile ./
 
 RUN make -j "$(nproc)"
 
-FROM alpine:3.20.1
+FROM alpine:3.20.3
 
 RUN apk add --no-cache \
 	libstdc++=13.2.1_git20240309-r0 \