diff --git a/ci/macos/prepare.sh b/ci/macos/prepare.sh
index 2e81e060c3..16e7e55085 100755
--- a/ci/macos/prepare.sh
+++ b/ci/macos/prepare.sh
@@ -5,5 +5,6 @@ sysctl hw.model hw.machine hw.ncpu hw.physicalcpu hw.logicalcpu
 set -e
 set -x
 
+brew update-reset
 brew upgrade cmake openssl
 brew install swig bison