diff --git a/server/Dockerfile b/server/Dockerfile
index bd9886e18f..19fc5ce87d 100644
--- a/server/Dockerfile
+++ b/server/Dockerfile
@@ -1,4 +1,4 @@
-FROM golang:1.25.7-alpine3.23 AS server-builder
+FROM golang:1.26.2-alpine3.23 AS server-builder
 
 RUN apk upgrade --no-cache && \
     apk add --no-cache \
@@ -15,7 +15,7 @@ COPY . ./
 
 RUN make build-server
 
-FROM golang:1.25.7-alpine3.23 AS dockerize-builder
+FROM golang:1.26.2-alpine3.23 AS dockerize-builder
 
 ARG DOCKERIZE_VERSION=v0.10.1
 RUN go install github.com/jwilder/dockerize@${DOCKERIZE_VERSION} && \
diff --git a/server/go.mod b/server/go.mod
index 97d361fef8..d63d8813de 100644
--- a/server/go.mod
+++ b/server/go.mod
@@ -2,6 +2,8 @@ module github.com/temporalio/ui-server/v2
 
 go 1.24.11
 
+toolchain go1.26.2
+
 require (
 	github.com/Masterminds/sprig/v3 v3.3.0
 	github.com/coreos/go-oidc/v3 v3.11.0