diff --git a/packages/fhir-json-schema-validator/package.json b/packages/fhir-json-schema-validator/package.json
index e5e53db1..1bc70b23 100644
--- a/packages/fhir-json-schema-validator/package.json
+++ b/packages/fhir-json-schema-validator/package.json
@@ -27,7 +27,7 @@
     "verbose": true
   },
   "dependencies": {
-    "ajv": "^6.12.6"
+    "ajv": "^6.12.3"
   },
   "publishConfig": {
     "access": "public"
diff --git a/packages/fhir-json-schema-validator/yarn.lock b/packages/fhir-json-schema-validator/yarn.lock
index 2d772681..b539d97b 100644
--- a/packages/fhir-json-schema-validator/yarn.lock
+++ b/packages/fhir-json-schema-validator/yarn.lock
@@ -2,20 +2,20 @@
 # yarn lockfile v1
 
 
-ajv@^6.10.0:
-  version "6.10.2"
-  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.10.2.tgz#d3cea04d6b017b2894ad69040fec8b623eb4bd52"
-  integrity sha512-TXtUUEYHuaTEbLZWIKUr5pmBuhDLy+8KYtPYdcV8qC+pOZL+NKqYwvWSRrVXHn+ZmRRAu8vJTAznH7Oag6RVRw==
+ajv@^6.12.3:
+  version "6.12.3"
+  resolved "https://registry.yarnpkg.com/ajv/-/ajv-6.12.3.tgz#18c5af38a111ddeb4f2697bd78d68abc1cabd706"
+  integrity sha512-4K0cK3L1hsqk9xIb2z9vs/XU+PGJZ9PNpJRDS9YLzmNdX6jmVPfamLvTJr0aDAusnHyCHO6MjzlkAsgtqp9teA==
   dependencies:
-    fast-deep-equal "^2.0.1"
+    fast-deep-equal "^3.1.1"
     fast-json-stable-stringify "^2.0.0"
     json-schema-traverse "^0.4.1"
     uri-js "^4.2.2"
 
-fast-deep-equal@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-2.0.1.tgz#7b05218ddf9667bf7f370bf7fdb2cb15fdd0aa49"
-  integrity sha1-ewUhjd+WZ79/Nwv3/bLLFf3Qqkk=
+fast-deep-equal@^3.1.1:
+  version "3.1.3"
+  resolved "https://registry.yarnpkg.com/fast-deep-equal/-/fast-deep-equal-3.1.3.tgz#3a7d56b559d6cbc3eb512325244e619a65c6c525"
+  integrity sha512-f3qQ9oQy9j2AhBe/H9VC91wLmKBCCU/gDOnKNAYG5hswO7BLKj09Hc5HYNz9cGI++xlpDCIgDaitVs03ATR84Q==
 
 fast-json-stable-stringify@^2.0.0:
   version "2.0.0"