diff --git a/CI/before_install.osx.sh b/CI/before_install.osx.sh
index e05ab5ab32..28350459a5 100755
--- a/CI/before_install.osx.sh
+++ b/CI/before_install.osx.sh
@@ -1,6 +1,7 @@
 #!/bin/sh -ex
 
 export HOMEBREW_NO_EMOJI=1
+brew tap --repair
 brew update --quiet
 
 # workaround python issue on travis