diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0a604b0..ac9cb64 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,17 @@ All notable changes to the `pisama` meta-package are documented here. The packag
 
 ## [Unreleased]
 
+## [0.6.5] - 2026-09-10
+
+### Fixed
+
+- Reject unsupported OTLP exports, empty traces and ambiguous span objects in
+  local analysis instead of reporting a misleading clean result.
+- Reject mixed JSONL trace envelopes and additional rows instead of silently
+  discarding evidence. Native spans and supported ATIF inputs remain supported.
+- This input-validation release does not change detector calibration or resolve
+  false positives in the separately versioned `pisama-core` dependency.
+
 ## [0.6.4] - 2026-09-08
 
 ### Fixed
diff --git a/pyproject.toml b/pyproject.toml
index bce06eb..8ecf2a3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "hatchling.build"
 
 [project]
 name = "pisama"
-version = "0.6.4"
+version = "0.6.5"
 description = "Multi-agent failure detection for production AI systems"
 readme = "README.md"
 license = "MIT"
diff --git a/src/pisama/__init__.py b/src/pisama/__init__.py
index 64ee6a1..45f4659 100644
--- a/src/pisama/__init__.py
+++ b/src/pisama/__init__.py
@@ -14,7 +14,7 @@
 
     __version__ = _pkg_version("pisama")
 except PackageNotFoundError:  # running from a source checkout without an install
-    __version__ = "0.6.4"
+    __version__ = "0.6.5"
 
 from pisama._analyze import AnalyzeResult, Issue, analyze, async_analyze
 from pisama._http import PisamaAuthError