diff --git a/CHANGELOG.md b/CHANGELOG.md
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,16 @@
 Brick changelog
 ---------------
 
+2.8
+---
+
+Behavior changes:
+* `FileBrowser` file marking with `Space` now honors the file browser's
+  configured file selector predicate.
+* `FileBrowser` file marking with `Space` and `Enter` now toggles file
+  selection rather than just selecting files, allowing for selected
+  files to be unselected.
+
 2.7
 ---
 
diff --git a/brick.cabal b/brick.cabal
--- a/brick.cabal
+++ b/brick.cabal
@@ -1,5 +1,5 @@
 name:                brick
-version:             2.7
+version:             2.8
 synopsis:            A declarative terminal user interface library
 description:
   Write terminal user interfaces (TUIs) painlessly with 'brick'! You
diff --git a/src/Brick/Widgets/FileBrowser.hs b/src/Brick/Widgets/FileBrowser.hs
--- a/src/Brick/Widgets/FileBrowser.hs
+++ b/src/Brick/Widgets/FileBrowser.hs
@@ -158,7 +158,7 @@
 import qualified Data.Set as Set
 import qualified Data.Vector as V
 import Lens.Micro
-import Lens.Micro.Mtl ((%=))
+import Lens.Micro.Mtl ((%=), use)
 import Lens.Micro.TH (lensRules, generateUpdateableOptics)
 import qualified Graphics.Vty as Vty
 import qualified System.Directory as D
@@ -728,8 +728,13 @@
         _ ->
             zoom fileBrowserEntriesL $ handleListEvent e
 
-markSelected :: FileInfo -> EventM n (FileBrowser n) ()
-markSelected e = fileBrowserSelectedFilesL %= Set.insert (fileInfoFilename e)
+toggleSelected :: FileInfo -> EventM n (FileBrowser n) ()
+toggleSelected e = do
+    fs <- use fileBrowserSelectedFilesL
+    let fName = fileInfoFilename e
+    if Set.member fName fs
+       then fileBrowserSelectedFilesL %= Set.delete fName
+       else fileBrowserSelectedFilesL %= Set.insert fName
 
 -- | If the browser's current entry is selectable according to
 -- @fileBrowserSelectable@, add it to the selection set and return.
@@ -742,14 +747,16 @@
     b <- get
     for_ (fileBrowserCursor b) $ \entry ->
         if fileBrowserSelectable b entry
-        then markSelected entry
+        then toggleSelected entry
         else when (selectDirectories entry) $
             put =<< liftIO (setWorkingDirectory (fileInfoFilePath entry) b)
 
 selectCurrentEntry :: EventM n (FileBrowser n) ()
 selectCurrentEntry = do
     b <- get
-    for_ (fileBrowserCursor b) markSelected
+    for_ (fileBrowserCursor b) $ \entry ->
+        when (fileBrowserSelectable b entry) $
+            toggleSelected entry
 
 -- | Render a file browser. This renders a list of entries in the
 -- working directory, a cursor to select from among the entries, a