diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0c6bd4..3f2cb56 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 Full release notes with details on each version: [GitHub Releases](https://github.com/safishamsi/graphify/releases)
 
+## 0.5.6 (2026-04-30)
+
+- Fix: `NameError: name '_os' is not defined` crash after `graphify update` — this was fixed in v5 branch but not released to PyPI (#618, #612)
+
 ## 0.5.5 (2026-04-29)
 
 - Feat: Kimi K2.6 backend — `pip install 'graphifyy[kimi]'` + `MOONSHOT_API_KEY` routes semantic extraction through Kimi K2.6. 3-6x richer relation extraction at ~3x lower cost. Claude remains default; Kimi is opt-in.
diff --git a/pyproject.toml b/pyproject.toml
index 22fb339..6ec11b0 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "graphifyy"
-version = "0.5.5"
+version = "0.5.6"
 description = "AI coding assistant skill (Claude Code, Codex, OpenCode, Cursor, Gemini CLI, Aider, OpenClaw, Factory Droid, Trae, Hermes, Kiro, Google Antigravity) - turn any folder of code, docs, papers, images, or videos into a queryable knowledge graph"
 readme = "README.md"
 license = { file = "LICENSE" }