diff --git a/pyproject.toml b/pyproject.toml
index 98ebf41b..5e468197 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -51,10 +51,10 @@ gfviz = ["jinja2", "fastapi", "shapely", "natsort"]
 klayout = ["klayout", "pyvis<=0.3.1", "vlsir", "vlsirtools", "gitpython"]
 luminescent = ["luminescent>=0.2.12,<0.4.0", "sortedcontainers"]
 maintainer = ["mypy", "tbump", "towncrier"]
-meow = ["meow-sim>=0.14.1,<0.15", "sax>=0.15.6,<0.16.0", "tidy3d>=2.8.2,<2.9"]
+meow = ["meow-sim>=0.14.1,<0.15", "sax~=0.16.3", "tidy3d>=2.8.2,<2.9"]
 meshwell = ["shapely", "meshwell~=2.1.1"]
 path_length_analysis = ["bokeh", "numba", "shapely"]
-sax = ["sax~=0.15.14"]
+sax = ["sax~=0.16.3"]
 schematic = ["bokeh", "ipywidgets", "natsort"]
 tidy3d = ["tidy3d>=2.8.2,<2.9", "gdstk"]
 vlsir = ["vlsir", "vlsirtools"]