diff --git a/scripts/dev-bundle-server-package.js b/scripts/dev-bundle-server-package.js
index 6dd47ddc82..521ac91382 100644
--- a/scripts/dev-bundle-server-package.js
+++ b/scripts/dev-bundle-server-package.js
@@ -17,7 +17,7 @@ var packageJson = {
     // (and there are backwards-incompatible changes either way).
     underscore: "1.5.2",
     "source-map-support": "https://github.com/meteor/node-source-map-support/tarball/1912478769d76e5df4c365e147f25896aee6375e",
-    semver: "4.1.0"
+    semver: "5.3.0"
   },
   // These are only used in dev mode (by shell.js) so end-users can avoid
   // needing to install them if they use `npm install --production`.
diff --git a/scripts/dev-bundle-tool-package.js b/scripts/dev-bundle-tool-package.js
index 7b4baf4d5a..09ad579d3b 100644
--- a/scripts/dev-bundle-tool-package.js
+++ b/scripts/dev-bundle-tool-package.js
@@ -28,7 +28,7 @@ var packageJson = {
     // (and there are backwards-incompatible changes either way).
     underscore: "1.5.2",
     "source-map-support": "https://github.com/meteor/node-source-map-support/tarball/1912478769d76e5df4c365e147f25896aee6375e",
-    semver: "4.1.0",
+    semver: "5.3.0",
     request: "2.47.0",
     fstream: "https://github.com/meteor/fstream/tarball/cf4ea6c175355cec7bee38311e170d08c4078a5d",
     tar: "2.2.1",