diff --git a/.tool-versions b/.tool-versions
index 6d51b8f..8fb8903 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-golang 1.24.3
+golang 1.26.3
diff --git a/Dockerfile b/Dockerfile
index b945330..d75f1c3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.24 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26@sha256:2981696eed011d747340d7252620932677929cce7d2d539602f56a8d7e9b660b AS builder
 
 WORKDIR /workspace
 COPY go.mod go.mod