diff --git a/CHANGELOG.md b/CHANGELOG.md
index b1476de..96b0086 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 ## Changelog
 
+### What was just completed (2026-02-17 session 31)
+- **v0.11.3 — Bugfix: Missing sfdisk in container (fdisk package):**
+  - `sfdisk` is in the `fdisk` package on Debian bookworm, not `util-linux`. Dockerfile had `util-linux` but not `fdisk`, so `sfdisk` was missing and partitioning failed.
+  - Added `fdisk` to Dockerfile's `apt-get install` list. Updated comment to clarify which package provides what.
+  - Verified: all six disk tools now present in container (`sfdisk`, `mkfs.ext4`, `blkid`, `mount`, `lsblk`, `partprobe`).
+  - **Files modified (1):** `Dockerfile`
+
 ### What was just completed (2026-02-17 session 30)
 - **v0.11.2 — Bugfix: /dev/sdb not accessible inside container:**
   - **Root cause:** Docker always creates a fresh tmpfs at `/dev` inside containers. Even with `privileged: true`, the bind mount `- /dev:/dev` is silently dropped. Block device nodes like `/dev/sdb` don't exist inside the container.
diff --git a/CONTEXT.md b/CONTEXT.md
index 94b57e3..635c1eb 100644
--- a/CONTEXT.md
+++ b/CONTEXT.md
@@ -20,7 +20,7 @@ Last updated: 2026-02-17 (session 28)
 - Customer deployments use Docker Compose (not Kubernetes) for simplicity
 
 ### felhom-controller (this repo)
-- **Version:** v0.11.2
+- **Version:** v0.11.3
 - **Phase 1:** ✅ COMPLETE — Stack Manager + Deploy Flow
 - **Phase 2:** ✅ COMPLETE — Monitoring & Health (scheduler, CPU/temp, healthchecks.io pings)
 - **Phase 3:** ✅ COMPLETE — Backups (DB dumps, restic integration, manual trigger, **dedicated backup page**)
@@ -33,6 +33,7 @@ Last updated: 2026-02-17 (session 28)
 - **Phase C:** ✅ COMPLETE — Storage Init Wizard, Data Migration & Startup Fix (disk scan/format/mount wizard, rsync-based migration, startup pings)
 - **v0.11.1 bugfix:** ✅ COMPLETE — Storage Scan: system disk detection via host fstab + blkid UUID resolution; FSType enrichment via `blkid -o export`
 - **v0.11.2 bugfix:** ✅ COMPLETE — /host-dev mount for block device access; `HostDevicePath()` helper; all format/scan/safety ops use /host-dev
+- **v0.11.3 bugfix:** ✅ COMPLETE — Added `fdisk` package to Dockerfile (provides `sfdisk`; not in `util-linux` on Debian bookworm)
 - **First app deployed:** Paperless-ngx on demo-felhom.eu (2026-02-13)
 - **Running on:** demo-felhom (N100 mini PC) at 192.168.0.162:8080
 - **All Phase 1-5 features working:** deploy, start/stop/restart/update, logs, health-aware states, auth, monitoring, backups, backup detail page, system monitoring page, settings page