diff --git a/Source/ASCollectionNode.mm b/Source/ASCollectionNode.mm
index bf854b046..ba31b41ca 100644
--- a/Source/ASCollectionNode.mm
+++ b/Source/ASCollectionNode.mm
@@ -820,7 +820,7 @@ - (void)registerSupplementaryNodeOfKind:(NSString *)elementKind
   [self.view registerSupplementaryNodeOfKind:elementKind];
 }
 
-- (void)performBatchAnimated:(BOOL)animated updates:(void (^)())updates completion:(void (^)(BOOL))completion
+- (void)performBatchAnimated:(BOOL)animated updates:(NS_NOESCAPE void (^)())updates completion:(void (^)(BOOL))completion
 {
   ASDisplayNodeAssertMainThread();
   if (self.nodeLoaded) {
@@ -835,7 +835,7 @@ - (void)performBatchAnimated:(BOOL)animated updates:(void (^)())updates completi
   }
 }
 
-- (void)performBatchUpdates:(void (^)())updates completion:(void (^)(BOOL))completion
+- (void)performBatchUpdates:(NS_NOESCAPE void (^)())updates completion:(void (^)(BOOL))completion
 {
   [self performBatchAnimated:UIView.areAnimationsEnabled updates:updates completion:completion];
 }
diff --git a/Source/ASCollectionView.mm b/Source/ASCollectionView.mm
index 94406b0ee..794be15bb 100644
--- a/Source/ASCollectionView.mm
+++ b/Source/ASCollectionView.mm
@@ -921,7 +921,7 @@ - (void)endUpdatesAnimated:(BOOL)animated completion:(nullable void (^)(BOOL))co
   }
 }
 
-- (void)performBatchAnimated:(BOOL)animated updates:(void (^)())updates completion:(void (^)(BOOL))completion
+- (void)performBatchAnimated:(BOOL)animated updates:(NS_NOESCAPE void (^)())updates completion:(void (^)(BOOL))completion
 {
   ASDisplayNodeAssertMainThread();
   [self beginUpdates];
@@ -936,7 +936,7 @@ - (void)performBatchAnimated:(BOOL)animated updates:(void (^)())updates completi
   [self endUpdatesAnimated:animated completion:completion];
 }
 
-- (void)performBatchUpdates:(void (^)())updates completion:(void (^)(BOOL))completion
+- (void)performBatchUpdates:(NS_NOESCAPE void (^)())updates completion:(void (^)(BOOL))completion
 {
   // We capture the current state of whether animations are enabled if they don't provide us with one.
   [self performBatchAnimated:[UIView areAnimationsEnabled] updates:updates completion:completion];
diff --git a/Source/ASImageNode.mm b/Source/ASImageNode.mm
index f30257a6b..d5739f1a4 100644
--- a/Source/ASImageNode.mm
+++ b/Source/ASImageNode.mm
@@ -323,7 +323,7 @@ - (NSObject *)drawParametersForAsyncLayer:(_ASDisplayLayer *)layer
   return drawParameters;
 }
 
-+ (UIImage *)displayWithParameters:(id<NSObject>)parameter isCancelled:(asdisplaynode_iscancelled_block_t)isCancelled
++ (UIImage *)displayWithParameters:(id<NSObject>)parameter isCancelled:(NS_NOESCAPE asdisplaynode_iscancelled_block_t)isCancelled
 {
   ASImageNodeDrawParameters *drawParameter = (ASImageNodeDrawParameters *)parameter;
 
diff --git a/Source/ASTableNode.mm b/Source/ASTableNode.mm
index cbcb54f77..4ac85989c 100644
--- a/Source/ASTableNode.mm
+++ b/Source/ASTableNode.mm
@@ -729,7 +729,7 @@ - (void)relayoutItems
   [self.view relayoutItems];
 }
 
-- (void)performBatchAnimated:(BOOL)animated updates:(void (^)())updates completion:(void (^)(BOOL))completion
+- (void)performBatchAnimated:(BOOL)animated updates:(NS_NOESCAPE void (^)())updates completion:(void (^)(BOOL))completion
 {
   ASDisplayNodeAssertMainThread();
   if (self.nodeLoaded) {
@@ -746,7 +746,7 @@ - (void)performBatchAnimated:(BOOL)animated updates:(void (^)())updates completi
   }
 }
 
-- (void)performBatchUpdates:(void (^)())updates completion:(void (^)(BOOL))completion
+- (void)performBatchUpdates:(NS_NOESCAPE void (^)())updates completion:(void (^)(BOOL))completion
 {
   [self performBatchAnimated:YES updates:updates completion:completion];
 }
diff --git a/Source/ASTextNode.mm b/Source/ASTextNode.mm
index 01819de41..1de1117dd 100644
--- a/Source/ASTextNode.mm
+++ b/Source/ASTextNode.mm
@@ -501,7 +501,7 @@ - (NSObject *)drawParametersForAsyncLayer:(_ASDisplayLayer *)layer
                                                  textContainerInsets:_textContainerInset];
 }
 
-+ (void)drawRect:(CGRect)bounds withParameters:(id)parameters isCancelled:(asdisplaynode_iscancelled_block_t)isCancelledBlock isRasterizing:(BOOL)isRasterizing
++ (void)drawRect:(CGRect)bounds withParameters:(id)parameters isCancelled:(NS_NOESCAPE asdisplaynode_iscancelled_block_t)isCancelledBlock isRasterizing:(BOOL)isRasterizing
 {
   ASTextNodeDrawParameter *drawParameter = (ASTextNodeDrawParameter *)parameters;
   UIColor *backgroundColor = (isRasterizing || drawParameter == nil) ? nil : drawParameter->_backgroundColor;
diff --git a/Source/ASTextNode2.mm b/Source/ASTextNode2.mm
index 813326bdd..aaa215e67 100644
--- a/Source/ASTextNode2.mm
+++ b/Source/ASTextNode2.mm
@@ -465,7 +465,7 @@ + (ASTextLayout *)compatibleLayoutWithContainer:(ASTextContainer *)container
   return layout;
 }
 
-+ (void)drawRect:(CGRect)bounds withParameters:(NSDictionary *)layoutDict isCancelled:(asdisplaynode_iscancelled_block_t)isCancelledBlock isRasterizing:(BOOL)isRasterizing
++ (void)drawRect:(CGRect)bounds withParameters:(NSDictionary *)layoutDict isCancelled:(NS_NOESCAPE asdisplaynode_iscancelled_block_t)isCancelledBlock isRasterizing:(BOOL)isRasterizing
 {
   ASTextContainer *container = layoutDict[@"container"];
   NSAttributedString *text = layoutDict[@"text"];
diff --git a/Source/TextKit/ASTextKitContext.mm b/Source/TextKit/ASTextKitContext.mm
index 012619c2e..0995a66f6 100644
--- a/Source/TextKit/ASTextKitContext.mm
+++ b/Source/TextKit/ASTextKitContext.mm
@@ -62,9 +62,9 @@ - (instancetype)initWithAttributedString:(NSAttributedString *)attributedString
   return self;
 }
 
-- (void)performBlockWithLockedTextKitComponents:(void (^)(NSLayoutManager *,
-                                                          NSTextStorage *,
-                                                          NSTextContainer *))block
+- (void)performBlockWithLockedTextKitComponents:(NS_NOESCAPE void (^)(NSLayoutManager *,
+                                                                      NSTextStorage *,
+                                                                      NSTextContainer *))block
 {
   ASDN::MutexSharedLocker l(__instanceLock__);
   if (block) {