diff --git a/CHANGELOG.txt b/CHANGELOG.txt
index 209f055..372aaf4 100644
--- a/CHANGELOG.txt
+++ b/CHANGELOG.txt
@@ -1,4 +1,4 @@
-3.1.0 (TBD)
+3.1.0 (2024-05-21)
 -----------------
 - Allow extra fields in Links (#144, @jonhealy1)
 - Remove the deprecated `Context` extension (#138, @vincentsarago)
diff --git a/README.md b/README.md
index ee747d8..b810802 100644
--- a/README.md
+++ b/README.md
@@ -11,13 +11,13 @@ For more comprehensive schema validation and robust extension support, use [pyst
 ## Installation
 
 ```shell
-pip install stac-pydantic
+python -m pip install stac-pydantic
 ```
 
 For local development:
 
 ```shell
-pip install -e '.[dev,lint]'
+python -m pip install -e '.[dev,lint]'
 ```
 
 | stac-pydantic | STAC Version | STAC API Version | Pydantic Version |
@@ -26,6 +26,7 @@ pip install -e '.[dev,lint]'
 | 1.3.x         | 1.0.0-beta.2 | <1* | ^1.6 |
 | 2.0.x         | 1.0.0        | <1* | ^1.6 |
 | 3.0.x         | 1.0.0        | 1.0.0 | ^2.4 |
+| 3.1.x         | 1.0.0        | 1.0.0 | ^2.4 |
 
 \* various beta releases, specs not fully implemented
 
@@ -58,7 +59,7 @@ tox
 Run a single test case using the standard pytest convention:
 
 ```shell
-pytest -v tests/test_models.py::test_item_extensions
+python -m pytest -v tests/test_models.py::test_item_extensions
 ```
 
 ## Usage
diff --git a/stac_pydantic/version.py b/stac_pydantic/version.py
index 7efd038..602c321 100644
--- a/stac_pydantic/version.py
+++ b/stac_pydantic/version.py
@@ -1,2 +1,5 @@
-__version__ = "3.0.0"
+"""stac-pydantic and STAC spec versions."""
+
+__version__ = "3.1.0"
+
 STAC_VERSION = "1.0.0"