diff --git a/MODULE.bazel b/MODULE.bazel
index 01d7556..b6b3fa2 100644
--- a/MODULE.bazel
+++ b/MODULE.bazel
@@ -41,9 +41,9 @@
 git_override(
     module_name = "pigweed",
     # ROLL: Warning: this entry is automatically updated.
-    # ROLL: Last updated 2025-09-21.
-    # ROLL: By https://cr-buildbucket.appspot.com/build/8703112571209059281.
-    commit = "2fb733cb5103f98af81d2bfedfd55e2eca7a8d52",
+    # ROLL: Last updated 2025-09-22.
+    # ROLL: By https://cr-buildbucket.appspot.com/build/8703002230006489281.
+    commit = "3959870dd94ecd688c531544a32b71bb8efe1101",
     remote = "https://pigweed.googlesource.com/pigweed/pigweed",
 )