diff --git a/containers/fluent-bit/Dockerfile b/containers/fluent-bit/Dockerfile
index 4c318c300..adb4e152d 100644
--- a/containers/fluent-bit/Dockerfile
+++ b/containers/fluent-bit/Dockerfile
@@ -3,7 +3,7 @@
 # Stage1: build from source
 FROM quay.io/cybozu/ubuntu-dev:22.04 AS builder
 
-ARG FLUENT_BIT_VERSION=2.0.9
+ARG FLUENT_BIT_VERSION=2.1.8
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
 
diff --git a/containers/fluent-bit/TAG b/containers/fluent-bit/TAG
index 54fd9a40d..5a4a4bc2a 100644
--- a/containers/fluent-bit/TAG
+++ b/containers/fluent-bit/TAG
@@ -1 +1 @@
-2.0.9.1
+2.1.8.2