diff --git a/.bumpversion.cfg b/.bumpversion.cfg
index 32e0e24..d1090eb 100644
--- a/.bumpversion.cfg
+++ b/.bumpversion.cfg
@@ -1,6 +1,6 @@
 [bumpversion]
 commit = True
 tag = True
-current_version = 6.12.0
+current_version = 6.13.0
 
 [bumpversion:file:nylas/_client_sdk_version.py]
diff --git a/CHANGELOG.md b/CHANGELOG.md
index be2411d..e5935a9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,7 +1,7 @@
 nylas-python Changelog
 ======================
 
-Unreleased
+v6.13.0
 ----------
 * Fixed from field handling in messages.send() to properly map "from_" field to "from field
 * Fixed content_id handling for large inline attachments to use content_id as field name instead of generic file{index}
diff --git a/Contributing.md b/Contributing.md
index 1a25264..76a7880 100644
--- a/Contributing.md
+++ b/Contributing.md
@@ -42,26 +42,35 @@ source .venv/bin/activate
 # .venv\Scripts\activate
 ```
 
+**Important**: If you encounter issues with `pip` not being available in the virtual environment, run:
+
+```bash
+# Ensure pip is available in the virtual environment
+python -m ensurepip --upgrade
+```
+
 ### 3. Install Development Dependencies
 
 Install the package in editable mode with all optional dependencies:
 
 ```bash
 # Install the package in development mode with all optional dependencies
-pip install -e ".[test,docs,release]"
+python -m pip install -e ".[test,docs,release]"
 
 # Or install specific dependency groups as needed:
-# pip install -e ".[test]"     # For running tests
-# pip install -e ".[docs]"     # For building documentation
-# pip install -e ".[release]"  # For release management
+# python -m pip install -e ".[test]"     # For running tests
+# python -m pip install -e ".[docs]"     # For building documentation
+# python -m pip install -e ".[release]"  # For release management
 ```
 
+**Note**: We use `python -m pip` instead of just `pip` to ensure we're using the pip from the virtual environment.
+
 ### 4. Install Code Quality Tools
 
 Install the linting and formatting tools used by the project:
 
 ```bash
-pip install pylint black
+python -m pip install pylint black
 ```
 
 ### 5. Verify Your Setup
diff --git a/nylas/_client_sdk_version.py b/nylas/_client_sdk_version.py
index 5474672..5dd6c42 100644
--- a/nylas/_client_sdk_version.py
+++ b/nylas/_client_sdk_version.py
@@ -1 +1 @@
-__VERSION__ = "6.12.0"
+__VERSION__ = "6.13.0"