diff --git a/packages/bignumber/package.json b/packages/bignumber/package.json
index b922bf6162..fff93bf047 100644
--- a/packages/bignumber/package.json
+++ b/packages/bignumber/package.json
@@ -3,7 +3,7 @@
   "dependencies": {
     "@ethersproject/bytes": "^5.2.0",
     "@ethersproject/logger": "^5.2.0",
-    "bn.js": "^4.4.0"
+    "bn.js": "^4.11.9"
   },
   "description": "BigNumber library used in ethers.js.",
   "ethereum": "donations.ethers.eth",
diff --git a/packages/sha2/package.json b/packages/sha2/package.json
index 908351a5f8..2807438035 100644
--- a/packages/sha2/package.json
+++ b/packages/sha2/package.json
@@ -9,7 +9,7 @@
   "dependencies": {
     "@ethersproject/bytes": "^5.2.0",
     "@ethersproject/logger": "^5.2.0",
-    "hash.js": "1.1.3"
+    "hash.js": "1.1.7"
   },
   "description": "The SHA2 family hash functions and HMAC functions for ethers.",
   "ethereum": "donations.ethers.eth",
diff --git a/packages/signing-key/package.json b/packages/signing-key/package.json
index 8d2d1e7bef..8c1cdac41e 100644
--- a/packages/signing-key/package.json
+++ b/packages/signing-key/package.json
@@ -7,7 +7,8 @@
     "@ethersproject/bytes": "^5.2.0",
     "@ethersproject/logger": "^5.2.0",
     "@ethersproject/properties": "^5.2.0",
-    "bn.js": "^4.4.0",
+    "bn.js": "^4.11.9",
+    "hash.js": "1.1.7",
     "elliptic": "6.5.4"
   },
   "description": "Elliptic curve library functions for the secp256k1 curve.",