diff --git a/CHANGELOG.md b/CHANGELOG.md
index cd66c2f..fefc05c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,14 @@
 # Changelog
 
+## 2.9.1
+
+### Changed: bump pinned @coana-tech/cli to 15.10.42
+
+- Bumped the pinned reachability engine (`@coana-tech/cli`) from `15.10.41` to
+  `15.10.42`. See the
+  [reachability analysis changelog](https://docs.socket.dev/docs/reachability-analysis-changelog)
+  for engine changes.
+
 ## 2.9.0
 
 ### Added: patched versions in human-readable security output
diff --git a/docs/cli-reference.md b/docs/cli-reference.md
index ae85a27..439c08b 100644
--- a/docs/cli-reference.md
+++ b/docs/cli-reference.md
@@ -336,7 +336,7 @@ If you don't want to provide the Socket API Token every time then you can use th
 | Parameter                        | Required | Default | Description                                                                                                                |
 |:---------------------------------|:---------|:--------|:---------------------------------------------------------------------------------------------------------------------------|
 | `--reach`                          | False    | False   | Enable reachability analysis to identify which vulnerable functions are actually called by your code. Creates a full application reachability scan (`scan_type=socket_tier1`). |
-| `--reach-version`                  | False    | 15.10.41 | Version of @coana-tech/cli to use. Defaults to the pinned version that ships with this CLI release, so the engine only changes when you upgrade the Socket CLI. Pass `latest` to always use the newest published version (opt-in auto-update), or an explicit version (e.g. `1.2.3`) to pin it. |
+| `--reach-version`                  | False    | 15.10.42 | Version of @coana-tech/cli to use. Defaults to the pinned version that ships with this CLI release, so the engine only changes when you upgrade the Socket CLI. Pass `latest` to always use the newest published version (opt-in auto-update), or an explicit version (e.g. `1.2.3`) to pin it. |
 | `--reach-analysis-timeout`         | False    | 10m     | Timeout for each reachability analysis run, e.g. `90s`, `10m` or `1h`. Omitted by default, so coana applies its own default (`10m`). Alias: `--reach-timeout` |
 | `--reach-analysis-memory-limit`    | False    | 8GB     | Memory limit for each reachability analysis run, e.g. `512MB` or `8GB`. Omitted by default, so coana applies its own default (`8GB`). Alias: `--reach-memory-limit` |
 | `--reach-concurrency`              | False    | 1       | Control parallel analysis execution (must be >= 1). Omitted by default, so coana applies its own default.                  |
diff --git a/pyproject.toml b/pyproject.toml
index 334ff1b..d1787dd 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -6,7 +6,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "socketsecurity"
-version = "2.9.0"
+version = "2.9.1"
 requires-python = ">= 3.11"
 license = {"file" = "LICENSE"}
 dependencies = [
diff --git a/socketsecurity/__init__.py b/socketsecurity/__init__.py
index ce3e70a..6344bb9 100644
--- a/socketsecurity/__init__.py
+++ b/socketsecurity/__init__.py
@@ -1,3 +1,3 @@
 __author__ = 'socket.dev'
-__version__ = '2.9.0'
+__version__ = '2.9.1'
 USER_AGENT = f'SocketPythonCLI/{__version__}'
diff --git a/socketsecurity/core/tools/reachability.py b/socketsecurity/core/tools/reachability.py
index 1c1bc43..9d1b771 100644
--- a/socketsecurity/core/tools/reachability.py
+++ b/socketsecurity/core/tools/reachability.py
@@ -19,7 +19,7 @@
 # Pinned @coana-tech/cli version. Bumped deliberately per Python CLI release so the
 # reachability engine version only changes through a standard pip upgrade (advance notice).
 # Pass --reach-version latest to opt into the newest published version instead.
-DEFAULT_COANA_CLI_VERSION: Final = "15.10.41"
+DEFAULT_COANA_CLI_VERSION: Final = "15.10.42"
 
 # Resolved @coana-tech/cli script paths from the npm-install fallback, keyed by version.
 # Lives for the process lifetime so repeated fallback invocations install only once
@@ -56,7 +56,7 @@ def __init__(self, sdk: socketdev, api_token: str):
     
     def _resolve_coana_package_spec(self, version: Optional[str] = None) -> str:
         """
-        Resolve the @coana-tech/cli package spec to run (e.g. '@coana-tech/cli@15.10.41').
+        Resolve the @coana-tech/cli package spec to run (e.g. '@coana-tech/cli@15.10.42').
 
         Args:
             version: Coana CLI version to use.
@@ -65,7 +65,7 @@ def _resolve_coana_package_spec(self, version: Optional[str] = None) -> str:
                 - '<semver>': that exact version.
 
         Returns:
-            str: The package specifier to use with npx (e.g. '@coana-tech/cli@15.10.41').
+            str: The package specifier to use with npx (e.g. '@coana-tech/cli@15.10.42').
         """
         return f"@coana-tech/cli@{self._resolve_coana_version(version)}"
 
diff --git a/uv.lock b/uv.lock
index 470f920..dd3f73e 100644
--- a/uv.lock
+++ b/uv.lock
@@ -1293,7 +1293,7 @@ wheels = [
 
 [[package]]
 name = "socketsecurity"
-version = "2.9.0"
+version = "2.9.1"
 source = { editable = "." }
 dependencies = [
     { name = "beautifulsoup4" },