diff --git a/packages/protons-benchmark/package.json b/packages/protons-benchmark/package.json
index 191f251..2d4ba77 100644
--- a/packages/protons-benchmark/package.json
+++ b/packages/protons-benchmark/package.json
@@ -24,7 +24,7 @@
     "aegir": "^48.0.1",
     "benchmark": "^2.1.4",
     "pbjs": "^0.0.14",
-    "protobufjs": "^7.5.4",
+    "protobufjs": "^8.4.0",
     "protons": "^9.0.0",
     "protons-runtime": "^7.0.0",
     "uint8arraylist": "^3.0.0"
diff --git a/packages/protons/package.json b/packages/protons/package.json
index 3ca89c8..5519c18 100644
--- a/packages/protons/package.json
+++ b/packages/protons/package.json
@@ -145,7 +145,7 @@
     "it-all": "^3.0.9",
     "long": "^5.3.2",
     "pbjs": "^0.0.14",
-    "protobufjs": "^7.5.4",
+    "protobufjs": "^8.4.0",
     "uint8arraylist": "^3.0.0",
     "uint8arrays": "^6.0.0"
   }