diff --git a/package.json b/package.json
index f886200d9..f43f78c90 100644
--- a/package.json
+++ b/package.json
@@ -58,7 +58,7 @@
     "temp": "0.7.0",
     "text-buffer": "^2.4.2",
     "theorist": "^1",
-    "underscore-plus": "^1.4.1",
+    "underscore-plus": "^1.5.0",
     "vm-compatibility-layer": "0.1.0"
   },
   "packageDependencies": {
diff --git a/src/gutter-component.coffee b/src/gutter-component.coffee
index 5fc1a1730..ed83a63d4 100644
--- a/src/gutter-component.coffee
+++ b/src/gutter-component.coffee
@@ -174,11 +174,11 @@ GutterComponent = React.createClass
 
     if previousDecorations?
       for decoration in previousDecorations
-        node.classList.remove(decoration.class) if editor.decorationMatchesType(decoration, 'gutter') and not contains(decorations, decoration)
+        node.classList.remove(decoration.class) if editor.decorationMatchesType(decoration, 'gutter') and not _.deepContains(decorations, decoration)
 
     if decorations?
       for decoration in decorations
-        if editor.decorationMatchesType(decoration, 'gutter') and not contains(previousDecorations, decoration)
+        if editor.decorationMatchesType(decoration, 'gutter') and not _.deepContains(previousDecorations, decoration)
           node.classList.add(decoration.class)
 
     unless @screenRowsByLineNumberId[lineNumberId] is screenRow
@@ -211,10 +211,3 @@ GutterComponent = React.createClass
     unless width is @measuredWidth
       @measuredWidth = width
       @props.onWidthChanged?(width)
-
-# Created because underscore uses === not _.isEqual, which we need
-contains = (array, target) ->
-  return false unless array?
-  for object in array
-    return true if _.isEqual(object, target)
-  false
diff --git a/src/lines-component.coffee b/src/lines-component.coffee
index d359306ed..4e016b601 100644
--- a/src/lines-component.coffee
+++ b/src/lines-component.coffee
@@ -215,11 +215,11 @@ LinesComponent = React.createClass
 
     if previousDecorations = @renderedDecorationsByLineId[line.id]
       for decoration in previousDecorations
-        lineNode.classList.remove(decoration.class) if editor.decorationMatchesType(decoration, 'line') and not contains(decorations, decoration)
+        lineNode.classList.remove(decoration.class) if editor.decorationMatchesType(decoration, 'line') and not _.deepContains(decorations, decoration)
 
     if decorations = lineDecorations[screenRow]
       for decoration in decorations
-        if editor.decorationMatchesType(decoration, 'line') and not contains(previousDecorations, decoration)
+        if editor.decorationMatchesType(decoration, 'line') and not _.deepContains(previousDecorations, decoration)
           lineNode.classList.add(decoration.class)
 
     return
@@ -292,10 +292,3 @@ LinesComponent = React.createClass
   clearScopedCharWidths: ->
     @measuredLines.clear()
     @props.editor.clearScopedCharWidths()
-
-# Created because underscore uses === not _.isEqual, which we need
-contains = (array, target) ->
-  return false unless array?
-  for object in array
-    return true if _.isEqual(object, target)
-  false