diff --git a/debian/lmcp/build-deb.sh b/debian/lmcp/build-deb.sh
index b4659ffa7d..7a3e47c289 100755
--- a/debian/lmcp/build-deb.sh
+++ b/debian/lmcp/build-deb.sh
@@ -7,9 +7,9 @@
 # package (Architecture: all, depends on lua + lua-socket).
 set -euo pipefail
 
-PKGVER=0.5.2
+PKGVER=0.5.3
 PKGREL=1
-LMCP_TARBALL_SHA256=5a5945e6f2511f440de8e961b82ec3deaab5e77cc9208c9999e831fbc33d702d
+LMCP_TARBALL_SHA256=821cb89927ea5f65e2849c526ef98692f1a55032911e7c3115c97d0814ddf08b
 HERE=$(dirname "$(readlink -f "$0")")
 
 # Reproducible build: pin all file mtimes + ar member timestamps to a fixed