diff --git a/.release-please-manifest.json b/.release-please-manifest.json
index c1028f92260..46b61466c66 100644
--- a/.release-please-manifest.json
+++ b/.release-please-manifest.json
@@ -5,7 +5,7 @@
   "packages/fork-diff": "0.6.0",
   "packages/guardian-prover-health-check": "0.1.0",
   "packages/guardian-prover-health-check-ui": "0.2.0",
-  "packages/protocol": "1.9.0",
+  "packages/protocol": "1.9.1",
   "packages/relayer": "0.12.0",
   "packages/snaefell-ui": "1.1.0",
   "packages/supplementary-contracts": "1.0.0",
diff --git a/packages/protocol/CHANGELOG.md b/packages/protocol/CHANGELOG.md
index e3cd132ef6a..40bb145218b 100644
--- a/packages/protocol/CHANGELOG.md
+++ b/packages/protocol/CHANGELOG.md
@@ -1,5 +1,17 @@
 # Changelog
 
+## [1.9.1](https://github.com/taikoxyz/taiko-mono/compare/protocol-v1.9.0...protocol-v1.9.1) (2024-09-13)
+
+
+### Bug Fixes
+
+* **protocol:** fix DCAP configuration script ([#18088](https://github.com/taikoxyz/taiko-mono/issues/18088)) ([e8618c5](https://github.com/taikoxyz/taiko-mono/commit/e8618c54a58993499e852ec2ffc2468d4f0274ba))
+
+
+### Documentation
+
+* **protocol:** update code4rena-2024-03-taiko-final-report.md ([#18062](https://github.com/taikoxyz/taiko-mono/issues/18062)) ([fd68794](https://github.com/taikoxyz/taiko-mono/commit/fd68794a2de24b7a32d2d5a1c3f52c2156b6d61a))
+
 ## [1.9.0](https://github.com/taikoxyz/taiko-mono/compare/protocol-v1.8.0...protocol-v1.9.0) (2024-09-12)
 
 
diff --git a/packages/protocol/package.json b/packages/protocol/package.json
index 55940fea2b7..1977fa4ee10 100644
--- a/packages/protocol/package.json
+++ b/packages/protocol/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@taiko/protocol",
-  "version": "1.9.0",
+  "version": "1.9.1",
   "private": true,
   "scripts": {
     "buildMerkle": "ts-node ./utils/airdrop/buildMerkleTree.ts ./utils/airdrop/airdrop_db/example_claimList.json",