diff --git a/Library/Homebrew/dev-cmd/bump.rb b/Library/Homebrew/dev-cmd/bump.rb
index 10dac55853226..b31f851f9cf48 100644
--- a/Library/Homebrew/dev-cmd/bump.rb
+++ b/Library/Homebrew/dev-cmd/bump.rb
@@ -35,6 +35,8 @@ def bump_args
              description: "Check only formulae."
       switch "--cask", "--casks",
              description: "Check only casks."
+      flag   "--tap=",
+             description: "Check formulae and casks within the given tap, specified as <user>`/`<repo>."
       switch "--installed",
              description: "Check formulae and casks that are currently installed."
       switch "--no-fork",
@@ -49,6 +51,7 @@ def bump_args
              hidden:      true
 
       conflicts "--cask", "--formula"
+      conflicts "--tap=", "--installed"
       conflicts "--no-pull-requests", "--open-pr"
 
       named_args [:formula, :cask], without_api: true
@@ -68,7 +71,14 @@ def bump
     odisabled "brew bump --force" if args.force?
 
     Homebrew.with_no_api_env do
-      formulae_and_casks = if args.installed?
+      formulae_and_casks = if args.tap
+        tap = Tap.fetch(args.tap)
+        raise UsageError, "`--tap` cannot be used with official taps." if tap.official?
+
+        formulae = args.cask? ? [] : tap.formula_files.map { |path| Formulary.factory(path) }
+        casks = args.formula? ? [] : tap.cask_files.map { |path| Cask::CaskLoader.load(path) }
+        formulae + casks
+      elsif args.installed?
         formulae = args.cask? ? [] : Formula.installed
         casks = args.formula? ? [] : Cask::Caskroom.casks
         formulae + casks
diff --git a/Library/Homebrew/test/dev-cmd/bump_spec.rb b/Library/Homebrew/test/dev-cmd/bump_spec.rb
index f576b23efb7e9..11b422088a2d2 100644
--- a/Library/Homebrew/test/dev-cmd/bump_spec.rb
+++ b/Library/Homebrew/test/dev-cmd/bump_spec.rb
@@ -20,4 +20,11 @@
         .and be_a_success
     end
   end
+
+  it "gives an error for `--tap` with official taps", :integration_test do
+    expect { brew "bump", "--tap", "Homebrew/core" }
+      .to output(/Invalid usage/).to_stderr
+      .and not_to_output.to_stdout
+      .and be_a_failure
+  end
 end