diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 853d956..2f4e6eb 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -92,6 +92,7 @@ jobs:
           - "3.11"
           - "3.12"
           - "3.13"
+          - "3.14"
     steps:
       - uses: actions/checkout@v4
       - name: Try to get cached BlazingMQ build artifacts
diff --git a/README.md b/README.md
index 58bd12e..adb1934 100644
--- a/README.md
+++ b/README.md
@@ -19,7 +19,7 @@
 [![MessageQueue](https://img.shields.io/badge/MessageQueue-blue)](#)
 [![Documentation](https://img.shields.io/badge/Documentation-blue)](https://bloomberg.github.io/blazingmq)
 [![Code Style](https://img.shields.io/badge/Black-black)](#)
-![Supported Python versions](https://img.shields.io/badge/python-3.7%20%7C%203.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.1220%7C%203.13-blue?logo=python)
+![Supported Python versions](https://img.shields.io/badge/python-3.8%20%7C%203.9%20%7C%203.10%20%7C%203.11%20%7C%203.12%20%7C%203.13%20%7C%203.14-blue?logo=python)
 
 # BlazingMQ Python SDK
 
diff --git a/news/60.misc.rst b/news/60.misc.rst
new file mode 100644
index 0000000..8955da4
--- /dev/null
+++ b/news/60.misc.rst
@@ -0,0 +1 @@
+Support Python 3.14
diff --git a/setup.py b/setup.py
index 09223a4..db9740a 100644
--- a/setup.py
+++ b/setup.py
@@ -201,6 +201,7 @@ def create_extension(name, libraries, **kwargs):
         "Programming Language :: Python :: 3.11",
         "Programming Language :: Python :: 3.12",
         "Programming Language :: Python :: 3.13",
+        "Programming Language :: Python :: 3.14",
         "Programming Language :: Python :: Implementation :: CPython",
         "Topic :: Software Development :: Libraries :: Python Modules",
         "Typing :: Typed",
diff --git a/src/blazingmq/_callbacks.py b/src/blazingmq/_callbacks.py
index 9b39c82..3eeb11a 100644
--- a/src/blazingmq/_callbacks.py
+++ b/src/blazingmq/_callbacks.py
@@ -123,12 +123,14 @@ def on_message(
         user_callback(message, message_handle)
 
     del message_handle  # The message handle holds a reference to the extension session.
-    if sys.getrefcount(ext_session) == 2:  # covered in a subprocess  # pragma: no cover
+    ext_session_ref_count = sys.getrefcount(ext_session)
+    if ext_session_ref_count == 2:  # covered in a subprocess  # pragma: no cover
         # Dropping our reference to the extension session will drop its reference count
         # to 0, calling __dealloc__ and stop() from its own background thread.
         print(
-            "Deadlock detected by blazingmq after calling %s; aborting process."
-            % user_callback,
+            f"Deadlock detected by blazingmq after calling { user_callback } " +
+            f"(ext_session ref count is { ext_session_ref_count }); " +
+            f"aborting process.",
             file=sys.stderr,
         )
         try: