diff --git a/Dockerfile b/Dockerfile
index 43e70f1..c70a5ad 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 
 # We use the latest Go 1.x version unless asked to use something else.
 # The GitHub Actions CI job sets this argument for a consistent Go version.
-ARG GO_VERSION=1.26.2
+ARG GO_VERSION=1.26.3
 
 # Setup the base environment. The BUILDPLATFORM is set automatically by Docker.
 # The --platform=${BUILDPLATFORM} flag tells Docker to build the function using