diff --git a/pyproject.toml b/pyproject.toml
index 6e16448..0b07da1 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -46,7 +46,7 @@ tests = [
 dataflow = [
   "absl-py",
   "apache-beam[gcp]",
-  "gcsfs<=2026.4.0",
+  "gcsfs<=2026.5.0",
   "xarray-beam",
 ]
 # Keep examples equivalent to dataflow, but avoid self-referential extras
@@ -54,7 +54,7 @@ dataflow = [
 examples = [
   "absl-py",
   "apache-beam[gcp]",
-  "gcsfs<=2026.4.0",
+  "gcsfs<=2026.5.0",
   "matplotlib",
   "xarray-beam",
 ]