diff --git a/.travis.yml b/.travis.yml
index a80bef8..fb6e033 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -10,6 +10,10 @@ osx_image: xcode10.1
 dist: bionic
 before_install:
   - cp .travis.settings.xml $HOME/.m2/settings.xml
+    - chmod +x travis/build.sh
+    - chmod +x travis/build_success.sh
+    - chmod +x travis/install_dependencies.sh
+    - chmod +x travis/setup_variables.sh
 addons:
   apt:
     update: true
diff --git a/travis/build.sh b/travis/build.sh
old mode 100644
new mode 100755
diff --git a/travis/build_success.sh b/travis/build_success.sh
old mode 100644
new mode 100755
diff --git a/travis/install_dependencies.sh b/travis/install_dependencies.sh
old mode 100644
new mode 100755
diff --git a/travis/setup_variables.sh b/travis/setup_variables.sh
old mode 100644
new mode 100755