diff --git a/.devcontainer/Dockerfile b/.devcontainer/Dockerfile
index 2327114..795fdc2 100644
--- a/.devcontainer/Dockerfile
+++ b/.devcontainer/Dockerfile
@@ -27,7 +27,7 @@ RUN apt-get update \
 # EIGS_REF is a tag/SHA (fetched directly, so it stays reproducible). Pinned to
 # v0.19.0 — the release that ships the flat-buffer tensors (shaped VAL_BUFFER,
 # #275) the neural policy's buffer path requires.
-ARG EIGS_REF=v0.28.0
+ARG EIGS_REF=v0.29.0
 RUN mkdir -p /opt/eigenscript && cd /opt/eigenscript && git init -q \
  && git remote add origin https://github.com/InauguralSystems/EigenScript.git \
  && git fetch -q --depth 1 origin "${EIGS_REF}" && git checkout -q FETCH_HEAD \