diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7cd02e2cd..f224abda1 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@
 
 ## Improvements
 
+# v1.26.1 / 2024-03-27
+
+**This is a patch release for the Calibration network user.** The Calibration network is scheduled for an upgrade to include the two additional built-in actor events to ease the transition and observability of DDO for the ecosystem ([#964](https://github.com/filecoin-project/FIPs/pull/964) and [#968](https://github.com/filecoin-project/FIPs/pull/968)).
+
+The agreed-upon epoch between the Filecoin implementer team for the update is `1493854`, corresponding to `2024-04-03T11:00:00Z`. All Calibration network users need to upgrade to this patch release before that.
+
+ **Lotus Mainnet Users**: For users on the Mainnet, the [Lotus v1.26.0](https://github.com/filecoin-project/lotus/releases/tag/v1.26.0) release already includes the aforementioned events in preparation for the Mainnet nv22 upgrade. Therefore, both v1.26.0 and v1.26.1 versions are suitable for use on the Mainnet for the coming network version 22 upgrade.
+
 # v1.26.0 / 2024-03-21
 
 This is the stable release for the upcoming MANDATORY Filecoin network upgrade v22, codenamed Dragon 🐉, at `epoch 3817920 - 2024-04-11 - 14:00:00Z`
diff --git a/build/openrpc/full.json.gz b/build/openrpc/full.json.gz
index eb2a3aae5..da276e6ab 100644
Binary files a/build/openrpc/full.json.gz and b/build/openrpc/full.json.gz differ
diff --git a/build/openrpc/gateway.json.gz b/build/openrpc/gateway.json.gz
index 1bd72f656..05122ea79 100644
Binary files a/build/openrpc/gateway.json.gz and b/build/openrpc/gateway.json.gz differ
diff --git a/build/openrpc/miner.json.gz b/build/openrpc/miner.json.gz
index 9929d440f..51c202d72 100644
Binary files a/build/openrpc/miner.json.gz and b/build/openrpc/miner.json.gz differ
diff --git a/build/openrpc/worker.json.gz b/build/openrpc/worker.json.gz
index 97b3be273..5f3ec4027 100644
Binary files a/build/openrpc/worker.json.gz and b/build/openrpc/worker.json.gz differ
diff --git a/build/version.go b/build/version.go
index cab765682..f216d0061 100644
--- a/build/version.go
+++ b/build/version.go
@@ -37,7 +37,7 @@ func BuildTypeString() string {
 }
 
 // BuildVersion is the local build version
-const BuildVersion = "1.26.0"
+const BuildVersion = "1.26.1"
 
 func UserVersion() string {
 	if os.Getenv("LOTUS_VERSION_IGNORE_COMMIT") == "1" {
diff --git a/documentation/en/cli-lotus-miner.md b/documentation/en/cli-lotus-miner.md
index 735bd2da8..d1761d3d0 100644
--- a/documentation/en/cli-lotus-miner.md
+++ b/documentation/en/cli-lotus-miner.md
@@ -7,7 +7,7 @@ USAGE:
    lotus-miner [global options] command [command options] [arguments...]
 
 VERSION:
-   1.26.0
+   1.26.1
 
 COMMANDS:
    init     Initialize a lotus miner repo
diff --git a/documentation/en/cli-lotus-provider.md b/documentation/en/cli-lotus-provider.md
index 29cfb7721..777c6dbee 100644
--- a/documentation/en/cli-lotus-provider.md
+++ b/documentation/en/cli-lotus-provider.md
@@ -7,7 +7,7 @@ USAGE:
    lotus-provider [global options] command [command options] [arguments...]
 
 VERSION:
-   1.26.0
+   1.26.1
 
 COMMANDS:
    run      Start a lotus provider process
diff --git a/documentation/en/cli-lotus-worker.md b/documentation/en/cli-lotus-worker.md
index 9705e7fe6..0c119f142 100644
--- a/documentation/en/cli-lotus-worker.md
+++ b/documentation/en/cli-lotus-worker.md
@@ -7,7 +7,7 @@ USAGE:
    lotus-worker [global options] command [command options] [arguments...]
 
 VERSION:
-   1.26.0
+   1.26.1
 
 COMMANDS:
    run        Start lotus worker
diff --git a/documentation/en/cli-lotus.md b/documentation/en/cli-lotus.md
index e6a80e0e6..84fa747e0 100644
--- a/documentation/en/cli-lotus.md
+++ b/documentation/en/cli-lotus.md
@@ -7,7 +7,7 @@ USAGE:
    lotus [global options] command [command options] [arguments...]
 
 VERSION:
-   1.26.0
+   1.26.1
 
 COMMANDS:
    daemon   Start a lotus daemon process