diff --git a/Dockerfile.linux.386 b/Dockerfile.linux.386
index cdaa7ef..e53f6ca 100644
--- a/Dockerfile.linux.386
+++ b/Dockerfile.linux.386
@@ -1,4 +1,4 @@
-FROM i386/alpine:3.20 AS build
+FROM i386/alpine:3.21 AS build
 RUN apk add --no-cache ca-certificates
 
 FROM scratch