diff --git a/.circleci/osx_install_dependencies.sh b/.circleci/osx_install_dependencies.sh
index 1ce75c3d5..2845b224a 100755
--- a/.circleci/osx_install_dependencies.sh
+++ b/.circleci/osx_install_dependencies.sh
@@ -37,6 +37,7 @@ set -eu
 
 if [ ! -f /usr/local/lib/libz3.a ] # if this file does not exists (cache was not restored), rebuild dependencies
 then
+  brew update
   brew unlink python
   brew install boost
   brew install cmake