diff --git a/Bolts/Common/BFTask.h b/Bolts/Common/BFTask.h
index 81069ccac..6e9073d73 100644
--- a/Bolts/Common/BFTask.h
+++ b/Bolts/Common/BFTask.h
@@ -72,7 +72,7 @@ typedef __nullable id(^BFContinuationBlock)(BFTask<ResultType> *task);
  all of the input tasks have completed.
  @param tasks An `NSArray` of the tasks to use as an input.
  */
-+ (instancetype)taskForCompletionOfAllTasks:(nullable NSArray *)tasks;
++ (instancetype)taskForCompletionOfAllTasks:(nullable NSArray<BFTask *> *)tasks;
 
 /*!
  Returns a task that will be completed once all of the input tasks have completed.
@@ -80,7 +80,7 @@ typedef __nullable id(^BFContinuationBlock)(BFTask<ResultType> *task);
  an `NSArray` of all task results in the order they were provided.
  @param tasks An `NSArray` of the tasks to use as an input.
  */
-+ (instancetype)taskForCompletionOfAllTasksWithResults:(nullable NSArray *)tasks;
++ (instancetype)taskForCompletionOfAllTasksWithResults:(nullable NSArray<BFTask *> *)tasks;
 
 /*!
  Returns a task that will be completed a certain amount of time in the future.
diff --git a/Bolts/Common/BFTask.m b/Bolts/Common/BFTask.m
index 5752c6d45..9dfa8a322 100644
--- a/Bolts/Common/BFTask.m
+++ b/Bolts/Common/BFTask.m
@@ -108,7 +108,7 @@ + (instancetype)cancelledTask {
     return [[self alloc] initCancelled];
 }
 
-+ (instancetype)taskForCompletionOfAllTasks:(NSArray *)tasks {
++ (instancetype)taskForCompletionOfAllTasks:(NSArray<BFTask *> *)tasks {
     __block int32_t total = (int32_t)tasks.count;
     if (total == 0) {
         return [self taskWithResult:nil];
@@ -166,7 +166,7 @@ + (instancetype)taskForCompletionOfAllTasks:(NSArray *)tasks {
     return tcs.task;
 }
 
-+ (instancetype)taskForCompletionOfAllTasksWithResults:(NSArray *)tasks {
++ (instancetype)taskForCompletionOfAllTasksWithResults:(NSArray<BFTask *> *)tasks {
     return [[self taskForCompletionOfAllTasks:tasks] continueWithSuccessBlock:^id(BFTask *task) {
         return [tasks valueForKey:@"result"];
     }];