diff --git a/package.json b/package.json
index fb3c8bfa..3882dcdd 100644
--- a/package.json
+++ b/package.json
@@ -51,7 +51,7 @@
     "@ava/babel": "^2.0.0",
     "@ava/typescript": "^4.0.0",
     "@tsconfig/node12": "^12.0.0",
-    "@types/eventsource": "^1.1.15",
+    "@types/eventsource": "^3.0.0",
     "@types/express": "^4.17.17",
     "@types/jsbn": "^1.2.33",
     "@types/make-fetch-happen": "^10.0.4",
diff --git a/yarn.lock b/yarn.lock
index 285801ab..ebe984ae 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -635,10 +635,12 @@
   dependencies:
     "@types/node" "*"
 
-"@types/eventsource@^1.1.15":
-  version "1.1.15"
-  resolved "https://registry.yarnpkg.com/@types/eventsource/-/eventsource-1.1.15.tgz#949383d3482e20557cbecbf3b038368d94b6be27"
-  integrity sha512-XQmGcbnxUNa06HR3VBVkc9+A2Vpi9ZyLJcdS5dwaQQ/4ZMWFO+5c90FnMUpbtMZwB/FChoYHwuVg8TvkECacTA==
+"@types/eventsource@^3.0.0":
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/@types/eventsource/-/eventsource-3.0.0.tgz#6b1b50c677032fd3be0b5c322e8ae819b3df62eb"
+  integrity sha512-yEhFj31FTD29DtNeqePu+A+lD6loRef6YOM5XfN1kUwBHyy2DySGlA3jJU+FbQSkrfmlBVluf2Dub/OyReFGKA==
+  dependencies:
+    eventsource "*"
 
 "@types/express-serve-static-core@^4.17.33":
   version "4.17.41"
@@ -2192,6 +2194,18 @@ eventemitter3@^5.0.1:
   resolved "https://registry.yarnpkg.com/eventemitter3/-/eventemitter3-5.0.1.tgz#53f5ffd0a492ac800721bb42c66b841de96423c4"
   integrity sha512-GWkBvjiSZK87ELrYOSESUYeVIc9mvLLf/nXalMOS5dYrgZq9o5OVkbZAVM06CVxYsCwH9BDZFPlQTlPA1j4ahA==
 
+eventsource-parser@^3.0.0:
+  version "3.0.0"
+  resolved "https://registry.yarnpkg.com/eventsource-parser/-/eventsource-parser-3.0.0.tgz#9303e303ef807d279ee210a17ce80f16300d9f57"
+  integrity sha512-T1C0XCUimhxVQzW4zFipdx0SficT651NnkR0ZSH3yQwh+mFMdLfgjABVi4YtMTtaL4s168593DaoaRLMqryavA==
+
+eventsource@*:
+  version "3.0.5"
+  resolved "https://registry.yarnpkg.com/eventsource/-/eventsource-3.0.5.tgz#0cae1eee2d2c75894de8b02a91d84e5c57f0cc5a"
+  integrity sha512-LT/5J605bx5SNyE+ITBDiM3FxffBiq9un7Vx0EwMDM3vg8sWKx/tO2zC+LMqZ+smAM0F2hblaDZUVZF0te2pSw==
+  dependencies:
+    eventsource-parser "^3.0.0"
+
 execa@7.2.0, execa@^7.1.1:
   version "7.2.0"
   resolved "https://registry.yarnpkg.com/execa/-/execa-7.2.0.tgz#657e75ba984f42a70f38928cedc87d6f2d4fe4e9"