diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3eba188..8c955fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,13 @@ Tags follow `v{opencode_version}[letter]` — bare tag for the first build on a
 
 ## Unreleased
 
+## v1.15.3 — 2026-05-16
+
+opencode 1.15.0 → 1.15.3 bump (three upstream patch releases).
+
+- **Bump:** opencode 1.15.0 → 1.15.3 (`OPENCODE_VERSION` in `Dockerfile.variant`).
+- No container-side changes. Smoke thresholds from v1.15.0b unchanged.
+
 ## v1.15.0b — 2026-05-15
 
 Rebuild of v1.15.0 with one fix — v1.15.0's `omos` variant landed at 3206 MB, 6 MB over the 3200 MB smoke threshold, so `smoke-omos` failed and `build-variant-omos` was skipped. opencode 1.15.0 grew slightly vs 1.14.50, leaving zero headroom on the existing threshold.
diff --git a/Dockerfile.variant b/Dockerfile.variant
index 0579af0..9734501 100644
--- a/Dockerfile.variant
+++ b/Dockerfile.variant
@@ -32,7 +32,7 @@ ARG USER_NAME=developer
 
 # ── Install opencode via npm ─────────────────────────────────────────
 ARG INSTALL_OPENCODE=true
-ARG OPENCODE_VERSION=1.15.0
+ARG OPENCODE_VERSION=1.15.3
 RUN if [ "${INSTALL_OPENCODE}" = "true" ]; then \
       NPM_CONFIG_PREFIX=/usr npm install -g opencode-ai@${OPENCODE_VERSION} && \
       opencode --version ; \