diff --git a/package-lock.json b/package-lock.json
index 9235804..006d1be 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -81,10 +81,10 @@
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.11.0.tgz",
       "integrity": "sha512-nCprB/0syFYy9fVYU1ox1l2KN8S9I+tziH8D4zdZuLT3N6RMlGSGt5FSTpAiHB/Whv8Qs1cWHma1aMKZyaHRKA==",
       "requires": {
-        "fast-deep-equal": "3.1.1",
-        "fast-json-stable-stringify": "2.1.0",
-        "json-schema-traverse": "0.4.1",
-        "uri-js": "4.2.2"
+        "fast-deep-equal": "^3.1.1",
+        "fast-json-stable-stringify": "^2.0.0",
+        "json-schema-traverse": "^0.4.1",
+        "uri-js": "^4.2.2"
       }
     },
     "asn1": {