diff --git a/tool/dev_release.sh b/tool/dev_release.sh
index 2512325..ab7cfe9 100755
--- a/tool/dev_release.sh
+++ b/tool/dev_release.sh
@@ -62,7 +62,7 @@ NOTES="$(git -C "$ROOT" log -1 --format=%s)"
 [[ -n "$(git -C "$ROOT" status --porcelain --untracked-files=no)" ]] && NOTES="$NOTES (+ uncommitted changes)"
 MANIFEST="$ROOT/dist/manifest.json"
 MANIFEST_VER="$VERSION" \
-MANIFEST_PROTO="$(sed -n 's/.*protoVersion = \([0-9]*\).*/\1/p' "$ROOT/packages/core/lib/src/constants.dart")" \
+MANIFEST_PROTO="$(sed -n 's/.*protoMax = \([0-9]*\).*/\1/p' "$ROOT/packages/core/lib/src/constants.dart")" \
 MANIFEST_URL="$BASE_URL/$(basename "$TARBALL")" \
 MANIFEST_SHA="$(sha256sum "$TARBALL" | cut -d' ' -f1)" \
 MANIFEST_NOTES="Test build: $NOTES" \
diff --git a/tool/release.sh b/tool/release.sh
index 8e70830..0c3dafe 100755
--- a/tool/release.sh
+++ b/tool/release.sh
@@ -51,7 +51,7 @@ done
 ORIGIN="$(git -C "$ROOT" remote get-url origin)"
 SERVER="$(echo "$ORIGIN" | sed -E 's#(https?://[^/]+)/.*#\1#')"
 REPO="$(echo "${ORIGIN%.git}" | sed -E 's#.*[:/]([^/]+/[^/]+)$#\1#')"
-PROTO="$(sed -n 's/.*protoVersion = \([0-9]*\).*/\1/p' "$ROOT/packages/core/lib/src/constants.dart")"
+PROTO="$(sed -n 's/.*protoMax = \([0-9]*\).*/\1/p' "$ROOT/packages/core/lib/src/constants.dart")"
 if [[ -n "$LATEST" && "$LATEST" != "v$VER" ]]; then
   NOTES="$(git -C "$ROOT" log -n 20 "$LATEST..HEAD" --format='- %s')"
 else