diff --git a/.tool-versions b/.tool-versions
index 6d51b8f..0eb4248 100644
--- a/.tool-versions
+++ b/.tool-versions
@@ -1 +1 @@
-golang 1.24.3
+golang 1.26.5
diff --git a/Dockerfile b/Dockerfile
index b945330..b10fd11 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM --platform=$BUILDPLATFORM golang:1.24 AS builder
+FROM --platform=$BUILDPLATFORM golang:1.26@sha256:3aff6657219a4d9c14e27fb1d8976c49c29fddb70ba835014f477e1c70636647 AS builder
 
 WORKDIR /workspace
 COPY go.mod go.mod