diff --git a/pyproject.toml b/pyproject.toml
index e2319e8..6bac3e8 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -40,12 +40,12 @@ dependencies = [
 
 optional-dependencies = { docs = [
     "dask-image==2025.11.0",
-    "matplotlib==3.10.8",
-    "pydata-sphinx-theme==0.17.0",
-    "sphinx==9.0.4",
+    "matplotlib==3.10.9",
+    "pydata-sphinx-theme==0.17.1",
+    "sphinx==9.1.0",
     "sphinx-autoapi==3.8.0",
-    "sphinx-gallery==0.20.0",
-    "tifffile==2026.4.11",
+    "sphinx-gallery==0.21.0",
+    "tifffile==2026.5.2",
 ] }
 
 [project.urls]