diff --git a/CHANGELOG.md b/CHANGELOG.md
index 606b0da6a..9638feee9 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,13 @@ A breaking change will get clearly marked in this log.
 ## Unreleased
 
 
+## [v10.1.2](https://github.com/stellar/js-stellar-sdk/compare/v10.1.1...v10.1.2)
+
+### Fix
+
+- Upgrades the `eventsource` dependency to fix a critical security vulnerability ([#783](https://github.com/stellar/js-stellar-sdk/pull/783)).
+
+
 ## [v10.1.1](https://github.com/stellar/js-stellar-sdk/compare/v10.1.0...v10.1.1)
 
 ### Fix
diff --git a/package.json b/package.json
index cef0a8b94..9216853b7 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "stellar-sdk",
-  "version": "10.1.1",
+  "version": "10.1.2",
   "description": "stellar-sdk is a library for working with the Stellar Horizon server.",
   "main": "./lib/index.js",
   "types": "./lib/index.d.ts",
@@ -135,7 +135,7 @@
     "bignumber.js": "^4.0.0",
     "detect-node": "^2.0.4",
     "es6-promise": "^4.2.4",
-    "eventsource": "^2.0.2",
+    "eventsource": "^1.1.1",
     "lodash": "^4.17.21",
     "randombytes": "^2.1.0",
     "stellar-base": "^8.0.1",
diff --git a/yarn.lock b/yarn.lock
index 069ba17ef..91558c81d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -3109,10 +3109,12 @@ events@^3.0.0:
   resolved "https://registry.yarnpkg.com/events/-/events-3.2.0.tgz#93b87c18f8efcd4202a461aec4dfc0556b639379"
   integrity sha512-/46HWwbfCX2xTawVfkKLGxMifJYQBWMwY1mjywRtb4c9x8l5NP3KoJtnIOiL1hfdRkIuYhETxQlo62IF8tcnlg==
 
-eventsource@^2.0.2:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/eventsource/-/eventsource-2.0.2.tgz#76dfcc02930fb2ff339520b6d290da573a9e8508"
-  integrity sha512-IzUmBGPR3+oUG9dUeXynyNmf91/3zUSJg1lCktzKw47OXuhco54U3r9B7O4XX+Rb1Itm9OZ2b0RkTs10bICOxA==
+eventsource@^1.1.1:
+  version "1.1.1"
+  resolved "https://registry.yarnpkg.com/eventsource/-/eventsource-1.1.1.tgz#4544a35a57d7120fba4fa4c86cb4023b2c09df2f"
+  integrity sha512-qV5ZC0h7jYIAOhArFJgSfdyz6rALJyb270714o7ZtNnw2WSJ+eexhKtE0O8LYPRsHZHf2osHKZBxGPvm3kPkCA==
+  dependencies:
+    original "^1.0.0"
 
 evp_bytestokey@^1.0.0, evp_bytestokey@^1.0.3:
   version "1.0.3"
@@ -6343,6 +6345,13 @@ ordered-read-streams@^1.0.0:
   dependencies:
     readable-stream "^2.0.1"
 
+original@^1.0.0:
+  version "1.0.2"
+  resolved "https://registry.yarnpkg.com/original/-/original-1.0.2.tgz#e442a61cffe1c5fd20a65f3261c26663b303f25f"
+  integrity sha512-hyBVl6iqqUOJ8FqRe+l/gS8H+kKYjrEndd5Pm1MfBtsEKA038HkkdbAl/72EAXGyonD/PFsvmVG+EvcIpliMBg==
+  dependencies:
+    url-parse "^1.4.3"
+
 os-browserify@^0.3.0:
   version "0.3.0"
   resolved "https://registry.yarnpkg.com/os-browserify/-/os-browserify-0.3.0.tgz#854373c7f5c2315914fc9bfc6bd8238fdda1ec27"
@@ -6922,6 +6931,11 @@ querystring@0.2.0:
   resolved "https://registry.yarnpkg.com/querystring/-/querystring-0.2.0.tgz#b209849203bb25df820da756e747005878521620"
   integrity sha1-sgmEkgO7Jd+CDadW50cAWHhSFiA=
 
+querystringify@^2.1.1:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/querystringify/-/querystringify-2.2.0.tgz#3345941b4153cb9d082d8eee4cda2016a9aef7f6"
+  integrity sha512-FIqgj2EUvTa7R50u0rGsyTftzjYmv/a3hO345bZNrqabNqjtgiDMgmo4mkUjd+nzU5oF3dClKqFIPUKybUyqoQ==
+
 randomatic@^3.0.0:
   version "3.1.1"
   resolved "https://registry.yarnpkg.com/randomatic/-/randomatic-3.1.1.tgz#b776efc59375984e36c537b2f51a1f0aff0da1ed"
@@ -8559,6 +8573,14 @@ urix@^0.1.0:
   resolved "https://registry.yarnpkg.com/urix/-/urix-0.1.0.tgz#da937f7a62e21fec1fd18d49b35c2935067a6c72"
   integrity sha1-2pN/emLiH+wf0Y1Js1wpNQZ6bHI=
 
+url-parse@^1.4.3:
+  version "1.5.10"
+  resolved "https://registry.yarnpkg.com/url-parse/-/url-parse-1.5.10.tgz#9d3c2f736c1d75dd3bd2be507dcc111f1e2ea9c1"
+  integrity sha512-WypcfiRhfeUP9vvF0j6rw0J3hrWrw6iZv3+22h6iRMJ/8z1Tj6XfLP4DsUix5MhMPnXpiHDoKyoZ/bdCkwBCiQ==
+  dependencies:
+    querystringify "^2.1.1"
+    requires-port "^1.0.0"
+
 url@^0.11.0:
   version "0.11.0"
   resolved "https://registry.yarnpkg.com/url/-/url-0.11.0.tgz#3838e97cfc60521eb73c525a8e55bfdd9e2e28f1"