diff --git a/images/runtimes/go1.12/Dockerfile.x86_64 b/images/runtimes/go1.12/Dockerfile.x86_64
index cb2944062f..1b18054006 100644
--- a/images/runtimes/go1.12/Dockerfile.x86_64
+++ b/images/runtimes/go1.12/Dockerfile.x86_64
@@ -1,4 +1,4 @@
 # Go is easy, since we already have everything we need to compile the proctor
 # binary and run the tests in the golang Docker image.
-FROM golang:1.12
+FROM golang:1.26rc3
 RUN ["go", "tool", "dist", "test", "-compile-only"]