diff --git a/.travis.yml b/.travis.yml
index 8e51387..1086826 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -81,6 +81,12 @@ before_install:
     elif node_version_lt '4.0' ; then npm_use_module 'supertest' '2.0.0'
     elif node_version_lt '6.0' ; then npm_use_module 'supertest' '3.4.2'
     fi
+  - |
+    # Configure typescript for type defs
+    if node_version_lt '4.0'; then
+      npm_remove_module_re '^typescript$'
+      npm_remove_module_re '^@types$'
+    fi
   # Update Node.js modules
   - |
     # Prune and rebuild node_modules