diff --git a/package.json b/package.json
index 18abd0f6f1dc..170bec68b044 100644
--- a/package.json
+++ b/package.json
@@ -151,8 +151,8 @@
     "d3-cloud": "1.2.1",
     "del": "^3.0.0",
     "dragula": "3.7.0",
-    "elasticsearch": "^15.3.0",
-    "elasticsearch-browser": "^15.3.0",
+    "elasticsearch": "^15.4.1",
+    "elasticsearch-browser": "^15.4.1",
     "encode-uri-query": "1.0.0",
     "execa": "^1.0.0",
     "expiry-js": "0.1.7",
diff --git a/src/legacy/core_plugins/elasticsearch/index.js b/src/legacy/core_plugins/elasticsearch/index.js
index e816ace07acd..29acfb97dd7d 100644
--- a/src/legacy/core_plugins/elasticsearch/index.js
+++ b/src/legacy/core_plugins/elasticsearch/index.js
@@ -60,7 +60,7 @@ export default function (kibana) {
         startupTimeout: Joi.number().default(5000),
         logQueries: Joi.boolean().default(false),
         ssl: sslSchema,
-        apiVersion: Joi.string().default('6.x'),
+        apiVersion: Joi.string().default('6.6'),
         healthCheck: Joi.object({
           delay: Joi.number().default(2500)
         }).default(),
diff --git a/x-pack/package.json b/x-pack/package.json
index 8e0dfbe9f900..982c05f95c45 100644
--- a/x-pack/package.json
+++ b/x-pack/package.json
@@ -162,7 +162,7 @@
     "dataloader": "^1.4.0",
     "dedent": "^0.7.0",
     "dragselect": "1.8.1",
-    "elasticsearch": "^15.2.0",
+    "elasticsearch": "^15.4.1",
     "extract-zip": "1.5.0",
     "file-saver": "^1.3.8",
     "font-awesome": "4.4.0",
diff --git a/yarn.lock b/yarn.lock
index 01159299dffc..05728e37b0c0 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -7281,10 +7281,10 @@ ejs@^2.2.4, ejs@^2.3.1:
   resolved "https://registry.yarnpkg.com/ejs/-/ejs-2.5.7.tgz#cc872c168880ae3c7189762fd5ffc00896c9518a"
   integrity sha1-zIcsFoiArjxxiXYv1f/ACJbJUYo=
 
-elasticsearch-browser@^15.3.0:
-  version "15.3.0"
-  resolved "https://registry.yarnpkg.com/elasticsearch-browser/-/elasticsearch-browser-15.3.0.tgz#e7214d3f2237e2fd0e22a6203f84f9a523701c7a"
-  integrity sha512-XadGC2BYs1xh/yCrdnuER4ryHuN6xM3C4FS2IVgfazJViUMDEe3J9BSnG5yIMkRURNWX0/ETmW3fheI5zqEpsg==
+elasticsearch-browser@^15.4.1:
+  version "15.4.1"
+  resolved "https://registry.yarnpkg.com/elasticsearch-browser/-/elasticsearch-browser-15.4.1.tgz#c5843a9b2953cc9a653c8f6076f60ee4e5a44595"
+  integrity sha512-jjuT3EoF4t+sECKgMWzfveisf4RdFJMFTfh8jGfsq7SVAHBkAKqdqYr8TdeJYbi7qfWZHl7MajMs0+vklI4U8A==
 
 elasticsearch@^15.2.0:
   version "15.2.0"
@@ -7295,10 +7295,10 @@ elasticsearch@^15.2.0:
     chalk "^1.0.0"
     lodash "^4.17.10"
 
-elasticsearch@^15.3.0:
-  version "15.3.0"
-  resolved "https://registry.yarnpkg.com/elasticsearch/-/elasticsearch-15.3.0.tgz#7a478d23e8af02b60fd03201f1c65fd5657bf7d3"
-  integrity sha512-anZpNB65mqr0aKAN/YPR5OFmD09KnbxBxzyc5vINkip6ECpyCSvBqCKbQNNY/FNwKop2urkRmtnU2sY5cVw1cw==
+elasticsearch@^15.4.1:
+  version "15.4.1"
+  resolved "https://registry.yarnpkg.com/elasticsearch/-/elasticsearch-15.4.1.tgz#28b54de22fea74003e57395e035926fe7b63b8dd"
+  integrity sha512-IL46Sv9krCKtpvlI37/vQVQrWx6QeT1OJhfWW6L3fIXzR1Vv5utO+DHYz8AosUI6vlkxShoq+y6sUIBhTF1OIg==
   dependencies:
     agentkeepalive "^3.4.1"
     chalk "^1.0.0"