diff --git a/README.md b/README.md
index a813179e83..91ff27014e 100644
--- a/README.md
+++ b/README.md
@@ -13,7 +13,7 @@ brew install ruby-build
 
 Upgrade with:
 ```sh
-brew update && brew upgrade ruby-build
+brew upgrade ruby-build
 ```
 
 ### Clone as rbenv plugin using git
diff --git a/bin/rbenv-install b/bin/rbenv-install
index 569e4895f3..4f6a3e5aad 100755
--- a/bin/rbenv-install
+++ b/bin/rbenv-install
@@ -240,7 +240,7 @@ if [ "$STATUS" == "2" ]; then
     echo -n "If the version you need is missing, try upgrading ruby-build"
     if [ "$here" != "${here#$(brew --prefix 2>/dev/null)}" ]; then
       printf ":\n\n"
-      echo "  brew update && brew upgrade ruby-build"
+      echo "  brew upgrade ruby-build"
     elif [ -d "${here}/.git" ]; then
       printf ":\n\n"
       echo "  git -C ${here} pull"
diff --git a/test/rbenv.bats b/test/rbenv.bats
index 4293fe4f5f..9907825f90 100644
--- a/test/rbenv.bats
+++ b/test/rbenv.bats
@@ -114,7 +114,7 @@ See all available versions with \`rbenv install --list'.
 
 If the version you need is missing, try upgrading ruby-build:
 
-  brew update && brew upgrade ruby-build
+  brew upgrade ruby-build
 OUT
 
   unstub brew