diff --git a/Cakebrew.xcodeproj/project.pbxproj b/Cakebrew.xcodeproj/project.pbxproj
index 2b260d5..3f98e99 100644
--- a/Cakebrew.xcodeproj/project.pbxproj
+++ b/Cakebrew.xcodeproj/project.pbxproj
@@ -1052,6 +1052,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_OBJC_EXPLICIT_OWNERSHIP_TYPE = YES;
 				CODE_SIGN_IDENTITY = "Mac Developer";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
@@ -1081,6 +1082,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CLANG_ENABLE_MODULES = YES;
 				CLANG_ENABLE_OBJC_ARC = YES;
+				CLANG_WARN_OBJC_EXPLICIT_OWNERSHIP_TYPE = YES;
 				CODE_SIGN_IDENTITY = "Mac Developer";
 				CODE_SIGN_STYLE = Automatic;
 				COMBINE_HIDPI_IMAGES = YES;
diff --git a/Cakebrew/BPHomebrewInterface.m b/Cakebrew/BPHomebrewInterface.m
index 3bb5fb5..96ab0ec 100644
--- a/Cakebrew/BPHomebrewInterface.m
+++ b/Cakebrew/BPHomebrewInterface.m
@@ -300,12 +300,14 @@ - (NSString*)performWrappedBrewCommandWithArguments:(NSArray*)arguments
 {
 	NSString __block *finalOutput = nil;
 
-	dispatch_sync(_taskOperationsQueue, ^{
+	dispatch_queue_t queue = _taskOperationsQueue;
+
+	dispatch_sync(queue, ^{
 		NSMutableString *output = [NSMutableString new];
 
 		[self performBrewCommandWithArguments:arguments
 					  wrapsSynchronousRequest:YES
-										queue:_taskOperationsQueue
+										queue:queue
 							  dataReturnBlock:^(NSString *partialOutput)
 		{
 			[output appendString:partialOutput];
diff --git a/Dependencies/PXSourceList b/Dependencies/PXSourceList
index 6d41383..38cecbd 160000
--- a/Dependencies/PXSourceList
+++ b/Dependencies/PXSourceList
@@ -1 +1 @@
-Subproject commit 6d41383347aa070589894a2798ddc2abbfda0f73
+Subproject commit 38cecbd7e1d8449cac2db4ed03fb0dd3cee14f9f