diff --git a/package.json b/package.json
index 59efb9e..af810fe 100644
--- a/package.json
+++ b/package.json
@@ -61,7 +61,7 @@
     "emoji-regex": "^8.0.0",
     "encoding": "^0.1.12",
     "escape-html": "^1.0.3",
-    "esm": "^3.2.22",
+    "esm": "^3.2.25",
     "events-light": "^1.0.5",
     "express": "^4.16.4",
     "file-api": "^0.10.4",
diff --git a/yarn.lock b/yarn.lock
index b22dfb7..dd0b82f 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2972,10 +2972,10 @@ eslint@~5.4.0:
     table "^4.0.3"
     text-table "^0.2.0"
 
-esm@^3.2.22:
-  version "3.2.22"
-  resolved "https://registry.yarnpkg.com/esm/-/esm-3.2.22.tgz#5062c2e22fee3ccfee4e8f20da768330da90d6e3"
-  integrity sha512-z8YG7U44L82j1XrdEJcqZOLUnjxco8pO453gKOlaMD1/md1n/5QrscAmYG+oKUspsmDLuBFZrpbxI6aQ67yRxA==
+esm@^3.2.25:
+  version "3.2.25"
+  resolved "https://registry.yarnpkg.com/esm/-/esm-3.2.25.tgz#342c18c29d56157688ba5ce31f8431fbb795cc10"
+  integrity sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA==
 
 esotope-hammerhead@^0.2.1:
   version "0.2.1"