diff --git a/.travis.yml b/.travis.yml
index 467b61e69..f22800698 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -18,7 +18,7 @@ before_install:
   - ln -s $tools_dir/nsis-3.0-src share/nsis
   - cd -  
   - wget -q https://www.free-decompiler.com/flash/nsis-3.0-addon.zip
-  - unzip nsis-3.0-addon.zip -d $tools_dir/nsis-3.0-src
+  - unzip nsis-3.0-addon.zip -o -d $tools_dir/nsis-3.0-src
   - wget -q https://www.free-decompiler.com/flash/launch4j-3.9-linux.tgz
   - tar zxvf launch4j-3.9-linux.tgz -C $tools_dir >/dev/null
   - echo "nsis.path = $tools_dir/nsis-3.0-src/bin" > tools.properties