diff --git a/package.json b/package.json
index b314906a..9c175464 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
 		"@dependency/handleEventLoop": "https://github.com/AppScriptIO/handleEventLoop#semver:^1.x.x",
 		"@dependency/handleJSNativeDataStructure": "https://github.com/AppScriptIO/handleJSNativeDataStructure#semver:^2.x.x",
 		"@dependency/handlePrototypeDelegation": "https://github.com/AppScriptIO/handlePrototypeDelegation#semver:^1.x.x",
-		"underscore": "^1.9.1"
+		"underscore": "^1.12.1"
 	},
 	"devDependencies": {
 		"@dependency/handlePrototypeDelegation": "https://github.com/AppScriptIO/handlePrototypeDelegation#semver:^1.x.x",
diff --git a/yarn.lock b/yarn.lock
index 0a5f69aa..5e22863d 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -9544,10 +9544,10 @@ unc-path-regex@^0.1.2:
   resolved "https://registry.yarnpkg.com/unc-path-regex/-/unc-path-regex-0.1.2.tgz#e73dd3d7b0d7c5ed86fbac6b0ae7d8c6a69d50fa"
   integrity sha1-5z3T17DXxe2G+6xrCufYxqadUPo=
 
-underscore@*, underscore@^1.9.1:
-  version "1.9.2"
-  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.9.2.tgz#0c8d6f536d6f378a5af264a72f7bec50feb7cf2f"
-  integrity sha512-D39qtimx0c1fI3ya1Lnhk3E9nONswSKhnffBI0gME9C99fYOkNi04xs8K6pePLhvl1frbDemkaBQ5ikWllR2HQ==
+underscore@*, underscore@^1.12.1, underscore@^1.9.1:
+  version "1.12.1"
+  resolved "https://registry.yarnpkg.com/underscore/-/underscore-1.12.1.tgz#7bb8cc9b3d397e201cf8553336d262544ead829e"
+  integrity sha512-hEQt0+ZLDVUMhebKxL4x1BTtDY7bavVofhZ9KZ4aI26X9SRaE+Y3m83XUL1UP2jn8ynjndwCCpEHdUG+9pP1Tw==
 
 undertaker-registry@^1.0.0:
   version "1.0.1"