diff --git a/Dockerfile b/Dockerfile
index e91900a..70a45e7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -7,7 +7,7 @@
 # --platform=$BUILDPLATFORM pins the build stage to the machine doing the
 # building, then Go cross-compiles to $TARGETARCH. Without it, building an
 # amd64 image from an arm64 workstation runs the whole toolchain under QEMU.
-FROM --platform=$BUILDPLATFORM golang:1.25-bookworm AS build
+FROM --platform=$BUILDPLATFORM golang:1.26-bookworm AS build
 
 WORKDIR /src