diff --git a/packages/blockstore-s3/package.json b/packages/blockstore-s3/package.json
index d0bc9512..80ca96e7 100644
--- a/packages/blockstore-s3/package.json
+++ b/packages/blockstore-s3/package.json
@@ -156,6 +156,6 @@
     "aegir": "^44.1.1",
     "interface-blockstore-tests": "^7.0.0",
     "p-defer": "^4.0.1",
-    "sinon": "^18.0.1"
+    "sinon": "^19.0.2"
   }
 }
diff --git a/packages/datastore-s3/package.json b/packages/datastore-s3/package.json
index 1f3cefa5..e4f14039 100644
--- a/packages/datastore-s3/package.json
+++ b/packages/datastore-s3/package.json
@@ -156,6 +156,6 @@
     "aegir": "^44.1.1",
     "interface-datastore-tests": "^6.0.0",
     "p-defer": "^4.0.1",
-    "sinon": "^18.0.1"
+    "sinon": "^19.0.2"
   }
 }