diff --git a/package.json b/package.json
index 4e626b3..cf943e3 100644
--- a/package.json
+++ b/package.json
@@ -31,7 +31,7 @@
   },
   "homepage": "https://github.com/interledger/crypto-conditions#readme",
   "devDependencies": {
-    "base64url": "^2.0.0",
+    "base64url": "^3.0.1",
     "ed25519": "0.0.4",
     "eslint": "^3.12.2",
     "eslint-config-standard": "^6.2.1",