diff --git a/XADArchiveParser.m b/XADArchiveParser.m
index 051c14e2..00513304 100644
--- a/XADArchiveParser.m
+++ b/XADArchiveParser.m
@@ -560,7 +560,7 @@ +(XADArchiveParser *)archiveParserForFileURL:(NSURL *)filename
 			{
 				// An empty array means scanning failed. Set a flag to
 				// warn the caller, and fall through to single-file mode.
-				props[XADVolumeScanningFailedKey] = @YES;
+				[props setValue:[NSNumber numberWithBool:YES] forKey:XADVolumeScanningFailedKey];
 			}
 		}
 	}
@@ -571,7 +571,7 @@ +(XADArchiveParser *)archiveParserForFileURL:(NSURL *)filename
 	parser.resourceFork = fork;
 	parser.filename = filename.path;
 	
-	props[XADVolumesKey] = @[filename.path];
+	props[XADVolumesKey] = [NSArray arrayWithObject:filename.path];
 	[parser addPropertiesFromDictionary:props];
 	
 	return [parser autorelease];
@@ -1067,7 +1067,7 @@ + (void)throwExceptionFromError:(NSError *)error
 		return;
 	}
 	NSMutableDictionary *exceptionUserInfo = [error.userInfo mutableCopy];
-	exceptionUserInfo[@"XADError"] = @((XADError)error.code);
+	[exceptionUserInfo setValue:[NSNumber numberWithInt:(XADError)error.code] forKey:@"XADError"];
 	[[[NSException alloc] initWithName:XADExceptionName reason:[XADException describeXADError:(XADError)error.code]
 							  userInfo:exceptionUserInfo] raise];
 
@@ -1550,7 +1550,7 @@ +(XADArchiveParser *)archiveParserForFileURL:(NSURL *)filename error:(NSError **
 		return nil;
 	}
 	if (errorptr) {
-		*errorptr = [NSError errorWithDomain:XADErrorDomain code:XADErrorNotSupported userInfo:@{NSURLErrorKey: filename}];
+		*errorptr = [NSError errorWithDomain:XADErrorDomain code:XADErrorNotSupported userInfo:[NSDictionary dictionaryWithObjectsAndKeys:filename, NSURLErrorKey, nil]];
 	}
 	return nil;
 }
@@ -1569,7 +1569,7 @@ +(XADArchiveParser *)archiveParserForPath:(NSString *)filename nserror:(NSError
 		return nil;
 	}
 	if (errorptr) {
-		*errorptr = [NSError errorWithDomain:XADErrorDomain code:XADErrorNotSupported userInfo:@{NSFilePathErrorKey: filename}];
+		*errorptr = [NSError errorWithDomain:XADErrorDomain code:XADErrorNotSupported userInfo:[NSDictionary dictionaryWithObjectsAndKeys:filename, NSFilePathErrorKey, nil]];
 	}
 	return nil;
 }
diff --git a/XADException.m b/XADException.m
index 8e75e5c4..d21572a8 100644
--- a/XADException.m
+++ b/XADException.m
@@ -85,7 +85,7 @@ +(NSError*)parseExceptionReturningNSError:(nonnull id)exception
 	{
 		NSException *e=exception;
 		NSString *name=[e name];
-		NSMutableDictionary *usrInfo = [NSMutableDictionary dictionaryWithDictionary:e.userInfo ?: @{}];
+		NSMutableDictionary *usrInfo = [NSMutableDictionary dictionaryWithDictionary:e.userInfo ?: [NSDictionary dictionary]];
 		usrInfo[XADExceptionReasonKey] = e.reason;
 		if ([name isEqualToString:XADExceptionName]) {
 			XADError errVal = [[e userInfo][@"XADError"] intValue];
diff --git a/XADSimpleUnarchiver.m b/XADSimpleUnarchiver.m
index 3ed5107b..87117c7d 100644
--- a/XADSimpleUnarchiver.m
+++ b/XADSimpleUnarchiver.m
@@ -328,7 +328,7 @@ -(BOOL)parseWithError:(NSError**)error
 {
 	if(entries.count) {
 		if (error) {
-			*error = [NSError errorWithDomain:XADErrorDomain code:XADErrorBadParameters userInfo:@{NSLocalizedDescriptionKey: @"You can not call parseAndUnarchive twice", NSDebugDescriptionErrorKey: @"You can not call parseAndUnarchive twice"}];
+			*error = [NSError errorWithDomain:XADErrorDomain code:XADErrorBadParameters userInfo:[NSDictionary dictionaryWithObjectsAndKeys:@"You can not call parseAndUnarchive twice", NSLocalizedDescriptionKey, @"You can not call parseAndUnarchive twice", NSDebugDescriptionErrorKey, nil]];
 		}
 		
 		return NO;