diff --git a/trust-manager/BRANCH b/trust-manager/BRANCH
index eb49d7c7f..b63ba696b 100644
--- a/trust-manager/BRANCH
+++ b/trust-manager/BRANCH
@@ -1 +1 @@
-0.7
+0.9
diff --git a/trust-manager/Dockerfile b/trust-manager/Dockerfile
index 0c9ce8837..bba71538a 100644
--- a/trust-manager/Dockerfile
+++ b/trust-manager/Dockerfile
@@ -1,7 +1,7 @@
 # trust-manager container
 
 # Stage1: build from source
-FROM ghcr.io/cybozu/golang:1.21-jammy AS build
+FROM ghcr.io/cybozu/golang:1.22-jammy AS build
 
 COPY TAG /
 WORKDIR /workspace
diff --git a/trust-manager/TAG b/trust-manager/TAG
index 964ff1fa7..69667e51b 100644
--- a/trust-manager/TAG
+++ b/trust-manager/TAG
@@ -1 +1 @@
-0.7.0.2
+0.9.2.1