diff --git a/tests/multiple-ports/Dockerfile b/tests/multiple-ports/Dockerfile
index f155d4c..b2f37ce 100644
--- a/tests/multiple-ports/Dockerfile
+++ b/tests/multiple-ports/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.25.2-alpine
+FROM golang:1.26rc3-alpine
 
 CMD ["multiple-ports"]
 EXPOSE 80 443