diff --git a/.devcontainer/devcontainer.json b/.devcontainer/devcontainer.json
index 9b15e9933..1bfd30c39 100644
--- a/.devcontainer/devcontainer.json
+++ b/.devcontainer/devcontainer.json
@@ -1,6 +1,6 @@
 {
   "name": "Kubebuilder DevContainer",
-  "image": "docker.io/golang:1.26.2",
+  "image": "docker.io/golang:1.26.3",
   "features": {
     "ghcr.io/devcontainers/features/docker-in-docker:2": {},
     "ghcr.io/devcontainers/features/git:1": {}
diff --git a/cmd/fluent-manager/Dockerfile b/cmd/fluent-manager/Dockerfile
index 7f4d61c36..674bb4c20 100644
--- a/cmd/fluent-manager/Dockerfile
+++ b/cmd/fluent-manager/Dockerfile
@@ -1,4 +1,4 @@
-ARG GO_VERSION=1.26.2
+ARG GO_VERSION=1.26.3
 
 # Build the manager binary \
 FROM --platform=$BUILDPLATFORM golang:${GO_VERSION}-alpine3.23 AS builder
diff --git a/cmd/fluent-watcher/fluentbit/Dockerfile b/cmd/fluent-watcher/fluentbit/Dockerfile
index bafebb0a3..0a2f3c558 100644
--- a/cmd/fluent-watcher/fluentbit/Dockerfile
+++ b/cmd/fluent-watcher/fluentbit/Dockerfile
@@ -1,5 +1,5 @@
 ARG FLUENT_BIT_BASE_VERSION=3.2.4 \
-    GO_VERSION=1.26.2
+    GO_VERSION=1.26.3
 
 FROM golang:${GO_VERSION}-alpine3.23 AS buildergo
 RUN mkdir -p /fluent-bit
diff --git a/cmd/fluent-watcher/fluentbit/Dockerfile.debug b/cmd/fluent-watcher/fluentbit/Dockerfile.debug
index b9c44931c..bc79e401f 100644
--- a/cmd/fluent-watcher/fluentbit/Dockerfile.debug
+++ b/cmd/fluent-watcher/fluentbit/Dockerfile.debug
@@ -1,5 +1,5 @@
 ARG FLUENT_BIT_BASE_VERSION=3.2.4 \
-    GO_VERSION=1.26.2
+    GO_VERSION=1.26.3
 
 FROM golang:${GO_VERSION}-alpine3.23 AS buildergo
 RUN mkdir -p /fluent-bit
diff --git a/cmd/fluent-watcher/fluentd/Dockerfile b/cmd/fluent-watcher/fluentd/Dockerfile
index 1cc2e06b1..c80668f7b 100644
--- a/cmd/fluent-watcher/fluentd/Dockerfile
+++ b/cmd/fluent-watcher/fluentd/Dockerfile
@@ -1,5 +1,5 @@
 ARG FLUENTD_BASE_VERSION \
-    GO_VERSION=1.26.2
+    GO_VERSION=1.26.3
 
 FROM golang:${GO_VERSION} AS builder
 
diff --git a/docs/best-practice/forwarding-logs-via-http/Dockerfile b/docs/best-practice/forwarding-logs-via-http/Dockerfile
index db83c6441..131492bd1 100644
--- a/docs/best-practice/forwarding-logs-via-http/Dockerfile
+++ b/docs/best-practice/forwarding-logs-via-http/Dockerfile
@@ -1,4 +1,4 @@
-GO_VERSION=1.26.2
+ARG GO_VERSION=1.26.3
 # Build the manager binary
 FROM golang:${GO_VERSION} AS builder
 
diff --git a/go.mod b/go.mod
index 214a8ea4b..6146c6a74 100644
--- a/go.mod
+++ b/go.mod
@@ -1,6 +1,6 @@
 module github.com/fluent/fluent-operator/v3
 
-go 1.26.2
+go 1.26.3
 
 require (
 	github.com/fsnotify/fsnotify v1.10.1