diff --git a/.github/workflows/url-check.yml b/.github/workflows/url-check.yml
index 6c6b6ba8..339033fd 100644
--- a/.github/workflows/url-check.yml
+++ b/.github/workflows/url-check.yml
@@ -17,4 +17,5 @@ jobs:
         uses: lycheeverse/lychee-action@v2
         with:
           # --exclude-loopback ensures we don't check localhost URLs
-          args: --exclude-loopback './**/*.md' './**/*.rst'
+          # --accept "200..=299,403" treats Cloudflare anti-bot blocks (403) as valid since the target page exists
+          args: --exclude-loopback --accept "200..=299,403" './**/*.md' './**/*.rst'
diff --git a/pyproject.toml b/pyproject.toml
index e61a5e98..02f9f4c8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -32,11 +32,11 @@ dependencies = [
 [project.optional-dependencies]
 server = ["dash-extensions", "gunicorn[gevent]", "habanero", "hiphive", "redis"]
 robocrys = ["robocrys"]
-temdiff = ["py4DSTEM>=0.13.11"]
+temdiff = []
 fermi = [
   "ifermi",
   "pyfftw",
-  "boltztrap2<25.11.1", # compilation issue when installing via pip
+  "boltztrap2",
 ]
 phonon = ["phonopy"]
 vtk = ["dash-vtk"]