diff --git a/.tool-versions b/.tool-versions
index 6d51b8f..5bc54b1 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-golang 1.24.3
+golang 1.26.4
diff --git a/Dockerfile b/Dockerfile
index b945330..d443dde 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.24 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26@sha256:792443b89f65105abba56b9bd5e97f680a80074ac62fc844a584212f8c8102c3 AS builder
 
 WORKDIR /workspace
 COPY go.mod go.mod