diff --git a/iOS/Base.lproj/Main.storyboard b/iOS/Base.lproj/Main.storyboard
index cc09703f1..39d68c0f5 100644
--- a/iOS/Base.lproj/Main.storyboard
+++ b/iOS/Base.lproj/Main.storyboard
@@ -1,8 +1,8 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15504" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
+<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="15400" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" useSafeAreas="YES" colorMatched="YES">
     <device id="retina6_1" orientation="portrait" appearance="light"/>
     <dependencies>
-        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15508"/>
+        <plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="15404"/>
         <capability name="Named colors" minToolsVersion="9.0"/>
         <capability name="Safe area layout guides" minToolsVersion="9.0"/>
         <capability name="documents saved in the Xcode 8 format" minToolsVersion="8.0"/>
@@ -90,7 +90,7 @@
                                     <action selector="nextArticle:" destination="JEX-9P-axG" id="P77-KM-j8D"/>
                                 </connections>
                             </barButtonItem>
-                            <barButtonItem title="Previous Article" image="chevron.up" catalog="system" style="plain" id="v4j-fq-23N">
+                            <barButtonItem title="Previous Article" image="chevron.up" catalog="system" id="v4j-fq-23N">
                                 <userDefinedRuntimeAttributes>
                                     <userDefinedRuntimeAttribute type="boolean" keyPath="accEnabled" value="YES"/>
                                     <userDefinedRuntimeAttribute type="string" keyPath="accLabelText" value="Previous Article"/>