diff --git a/Dockerfile.builder b/Dockerfile.builder
index 72c5019ce..7e647cd46 100644
--- a/Dockerfile.builder
+++ b/Dockerfile.builder
@@ -10,7 +10,7 @@ ARG TARGETARCH
 ENV TZ=Etc/UTC
 
 # renovate: datasource=golang-version depName=go
-ENV GO_VERSION=1.26.4
+ENV GO_VERSION=1.26.5
 
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
 RUN apt-get update && \