diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 6317349..b891d43 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -85,7 +85,7 @@ jobs:
         id: pinned
         uses: ./
         with:
-          mergify_cli_version: 2026.6.16.1
+          mergify_cli_version: 2026.7.21.1
 
       - name: Assert pinned install
         env:
@@ -93,8 +93,8 @@ jobs:
         run: |
           # Compare against the literal requested version (not the action's own
           # readback), so a regression that installs the wrong version fails CI.
-          test "$VERSION" = "2026.6.16.1"
-          test "$(mergify --version | awk '{print $NF}')" = "2026.6.16.1"
+          test "$VERSION" = "2026.7.21.1"
+          test "$(mergify --version | awk '{print $NF}')" = "2026.7.21.1"
 
       - name: Install latest mergify-cli
         id: latest
diff --git a/README.md b/README.md
index 9462df3..aa9af51 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ Pin a specific `mergify-cli` version, or install the latest one:
 
 | Input | Type | Required | Default | Description |
 | --- | --- | --- | --- | --- |
-| `mergify_cli_version` | string | false | `2026.7.8.1` | Version of mergify-cli to install. Use `latest` to install the latest released version without pinning. |
+| `mergify_cli_version` | string | false | `2026.7.21.1` | Version of mergify-cli to install. Use `latest` to install the latest released version without pinning. |
 
 <!-- AUTO-DOC-INPUT:END -->
 
diff --git a/action.yml b/action.yml
index 40771f1..e35cd6d 100644
--- a/action.yml
+++ b/action.yml
@@ -10,7 +10,7 @@ inputs:
       Version of mergify-cli to install. Use `latest` to install the latest
       released version without pinning.
     # renovate: datasource=github-releases depName=Mergifyio/mergify-cli versioning=pep440
-    default: 2026.7.8.1
+    default: 2026.7.21.1
 outputs:
   mergify_cli_version:
     description: |