diff --git a/InstallerGUI/mkbundle.sh b/InstallerGUI/mkbundle.sh
index 664ca4a..98791ff 100644
--- a/InstallerGUI/mkbundle.sh
+++ b/InstallerGUI/mkbundle.sh
@@ -7,8 +7,8 @@ extraArgs=""
 if [ "$(uname)" == "Darwin" ]; then
 	platform="macos"
 	export PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/usr/lib/pkgconfig:/Library/Frameworks/Mono.framework/Versions/Current/lib/pkgconfig
-	export AS="as -arch i386"
-	export CC="clang -arch i386 -framework CoreFoundation -lobjc -liconv -mmacosx-version-min=10.6"
+	export AS="as -arch x86_64"
+	export CC="clang -arch x86_64 -framework CoreFoundation -lobjc -liconv -mmacosx-version-min=10.6"
 else
 	extraArgs="-L /usr/lib/mono/4.5"
 	if [ "$(uname -m)" == 'x86_64' ]; then
diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index ff0df8e..ee2d714 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -53,7 +53,7 @@ jobs:
 
   - task: UsePythonVersion@0
     inputs:
-      versionSpec: '3.4.4'
+      versionSpec: '3.5.4'
       addToPath: true
   - script: python -m pip install --upgrade pip
     displayName: 'Install tools'
@@ -104,7 +104,7 @@ jobs:
 
 - job: MacInstaller
   pool:
-    vmImage: 'macOS-10.13'
+    vmImage: 'macOS-10.14'
   dependsOn: WindowsInstaller
   steps:
   - task: DownloadBuildArtifacts@0
@@ -113,7 +113,7 @@ jobs:
       downloadPath: '$(System.DefaultWorkingDirectory)/Installer'
   - task: UsePythonVersion@0
     inputs:
-      versionSpec: '3.4.8'
+      versionSpec: '3.5.9'
       addToPath: true
 
   - script: python -m pip install --upgrade pip