diff --git a/.travis.yml b/.travis.yml
index afc7680..b34d9e7 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,7 +1,7 @@
 osx_image: xcode8
 language: objective-c
 before_install:
- - ./build-libssl.sh verbose-on-error
+ - ./build-libssl.sh --noparallel --verbose-on-error
  - xcrun -sdk iphoneos lipo -info ./lib/*.a
  - ./create-openssl-framework.sh
  - xcrun -sdk iphoneos lipo -info openssl.framework/openssl