diff --git a/Library/Homebrew/cmd/deps.rb b/Library/Homebrew/cmd/deps.rb
index 42e50c984a2a7cef786d4030ae90ef5365cd7878..06ccf99b1c16200e8a5d2ee8e9125ccf35870c7d 100644
--- a/Library/Homebrew/cmd/deps.rb
+++ b/Library/Homebrew/cmd/deps.rb
@@ -57,8 +57,14 @@ module Homebrew
              description: "Switch into the mode used by the `--all` option, but only list dependencies "\
                           "for each provided <formula>, one formula per line. This is used for "\
                           "debugging the `--installed`/`--all` display mode."
-
+      switch "--formula", "--formulae",
+             depends_on:  "--installed",
+             description: "Treat all named arguments as formulae."
+      switch "--cask", "--casks",
+             depends_on:  "--installed",
+             description: "Treat all named arguments as casks."
       conflicts "--installed", "--all"
+      conflicts "--formula", "--cask"
       formula_options
     end
   end
@@ -82,7 +88,13 @@ module Homebrew
       dependents = if args.named.present?
         sorted_dependents(args.named.to_formulae_and_casks)
       elsif args.installed?
-        sorted_dependents(Formula.installed + Cask::Caskroom.casks(config: Cask::Config.from_args(args)))
+        if args.formula? && !args.cask?
+          sorted_dependents(Formula.installed)
+        elsif args.cask? && !args.formula?
+          sorted_dependents(Cask::Caskroom.casks(config: Cask::Config.from_args(args)))
+        else
+          sorted_dependents(Formula.installed + Cask::Caskroom.casks(config: Cask::Config.from_args(args)))
+        end
       else
         raise FormulaUnspecifiedError
       end
@@ -100,8 +112,14 @@ module Homebrew
     if args.no_named?
       raise FormulaUnspecifiedError unless args.installed?
 
-      puts_deps sorted_dependents(Formula.installed + Cask::Caskroom.casks(config: Cask::Config.from_args(args))),
-                recursive: recursive, args: args
+      sorted_dependents_formulae_and_casks = if args.formula? && !args.cask?
+        sorted_dependents(Formula.installed)
+      elsif args.cask? && !args.formula?
+        sorted_dependents(Cask::Caskroom.casks(config: Cask::Config.from_args(args)))
+      else
+        sorted_dependents(Formula.installed + Cask::Caskroom.casks(config: Cask::Config.from_args(args)))
+      end
+      puts_deps sorted_dependents_formulae_and_casks, recursive: recursive, args: args
       return
     end
 
diff --git a/docs/Manpage.md b/docs/Manpage.md
index 0d7b130b288c6ff6b9de550633b2ce806df71d6d..27525453db7f2e12b602b1539dbb1f2e13fead00 100644
--- a/docs/Manpage.md
+++ b/docs/Manpage.md
@@ -129,6 +129,10 @@ show the intersection of dependencies for each formula.
   List dependencies for all available formulae.
 * `--for-each`:
   Switch into the mode used by the `--all` option, but only list dependencies for each provided *`formula`*, one formula per line. This is used for debugging the `--installed`/`--all` display mode.
+* `--formula`:
+  Treat all named arguments as formulae.
+* `--cask`:
+  Treat all named arguments as casks.
 
 ### `desc` [*`options`*] (*`text`*|`/`*`text`*`/`|*`formula`*)
 
diff --git a/manpages/brew.1 b/manpages/brew.1
index 684615bdd0b437a5facc7b101abe1c8924f684a4..2e6304a46156efc685f4aa7c92b78b1e04fc1684 100644
--- a/manpages/brew.1
+++ b/manpages/brew.1
@@ -152,6 +152,14 @@ List dependencies for all available formulae\.
 \fB\-\-for\-each\fR
 Switch into the mode used by the \fB\-\-all\fR option, but only list dependencies for each provided \fIformula\fR, one formula per line\. This is used for debugging the \fB\-\-installed\fR/\fB\-\-all\fR display mode\.
 .
+.TP
+\fB\-\-formula\fR
+Treat all named arguments as formulae\.
+.
+.TP
+\fB\-\-cask\fR
+Treat all named arguments as casks\.
+.
 .SS "\fBdesc\fR [\fIoptions\fR] (\fItext\fR|\fB/\fR\fItext\fR\fB/\fR|\fIformula\fR)"
 Display \fIformula\fR\'s name and one\-line description\. Formula descriptions are cached; the cache is created on the first search, making that search slower than subsequent ones\.
 .