diff --git a/frontend/package.json b/frontend/package.json
index cba7202019..b777e0ffd9 100644
--- a/frontend/package.json
+++ b/frontend/package.json
@@ -56,8 +56,7 @@
 		"d3-tip": "^0.9.1",
 		"dayjs": "^1.10.7",
 		"dotenv": "8.2.0",
-		"event-source-polyfill": "^1.0.31",
-		"eventsource": "^2.0.2",
+		"event-source-polyfill": "1.0.31",
 		"file-loader": "6.1.1",
 		"flat": "^5.0.2",
 		"history": "4.10.1",
diff --git a/frontend/yarn.lock b/frontend/yarn.lock
index 3116fc9ed2..bf794326ee 100644
--- a/frontend/yarn.lock
+++ b/frontend/yarn.lock
@@ -6192,7 +6192,7 @@ etag@~1.8.1:
   resolved "https://registry.yarnpkg.com/etag/-/etag-1.8.1.tgz#41ae2eeb65efa62268aebfea83ac7d79299b0887"
   integrity sha1-Qa4u62XvpiJorr/qg6x9eSmbCIc=
 
-event-source-polyfill@^1.0.31:
+event-source-polyfill@1.0.31:
   version "1.0.31"
   resolved "https://registry.yarnpkg.com/event-source-polyfill/-/event-source-polyfill-1.0.31.tgz#45fb0a6fc1375b2ba597361ba4287ffec5bf2e0c"
   integrity sha512-4IJSItgS/41IxN5UVAVuAyczwZF7ZIEsM1XAoUzIHA6A+xzusEZUutdXz2Nr+MQPLxfTiCvqE79/C8HT8fKFvA==
@@ -6207,11 +6207,6 @@ events@^3.2.0:
   resolved "https://registry.yarnpkg.com/events/-/events-3.3.0.tgz#31a95ad0a924e2d2c419a813aeb2c4e878ea7400"
   integrity sha512-mQw+2fkQbALzQ7V0MY0IqdnXNOeTtP4r0lN9z7AAawCXgqea7bDii20AYrIBrFd/Hx0M2Ocz6S111CaFkUcb0Q==
 
-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==
-
 exec-sh@^0.3.2:
   version "0.3.6"
   resolved "https://registry.yarnpkg.com/exec-sh/-/exec-sh-0.3.6.tgz#ff264f9e325519a60cb5e273692943483cca63bc"