diff --git a/.ci/install.sh b/.ci/install.sh
index a968e69dbd04845573597b9a55ac7ae2769f0d70..c291a293524abaf9243176cf74f6fe0f518f7bbe 100755
--- a/.ci/install.sh
+++ b/.ci/install.sh
@@ -4,6 +4,6 @@ set -ex
 
 if [ $TRAVIS_OS_NAME == osx ]; then
     brew update || true
-    brew upgrade boost cmake
+    brew upgrade boost
     brew install libsodium
 fi