diff --git a/fuzz/jpegsave_buffer_fuzzer.cc b/fuzz/jpegsave_buffer_fuzzer.cc
index 6c7a5fdf..5f095792 100644
--- a/fuzz/jpegsave_buffer_fuzzer.cc
+++ b/fuzz/jpegsave_buffer_fuzzer.cc
@@ -14,6 +14,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	void *buf;
 	size_t len;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(image = vips_image_new_from_buffer( data, size, "", NULL )) ) 
 		return( 0 );
 
diff --git a/fuzz/jpegsave_file_fuzzer.cc b/fuzz/jpegsave_file_fuzzer.cc
index 7b31fedc..8d53ca03 100644
--- a/fuzz/jpegsave_file_fuzzer.cc
+++ b/fuzz/jpegsave_file_fuzzer.cc
@@ -42,6 +42,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 {
 	char *name;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(name = vips__temp_name( "%s" )) )
 		return( 0 );
 
diff --git a/fuzz/mosaic_fuzzer.cc b/fuzz/mosaic_fuzzer.cc
index 7f3c82b8..913f0ca2 100644
--- a/fuzz/mosaic_fuzzer.cc
+++ b/fuzz/mosaic_fuzzer.cc
@@ -25,6 +25,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	if( size < sizeof( struct mosaic_opt ) )
 		return( 0 );
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(ref = vips_image_new_from_buffer( data, size, "", NULL )) )
 		return( 0 );
 
diff --git a/fuzz/pngsave_buffer_fuzzer.cc b/fuzz/pngsave_buffer_fuzzer.cc
index 099c5d41..b0fec7cd 100644
--- a/fuzz/pngsave_buffer_fuzzer.cc
+++ b/fuzz/pngsave_buffer_fuzzer.cc
@@ -14,6 +14,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	void *buf;
 	size_t len;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(image = vips_image_new_from_buffer( data, size, "", NULL )) ) 
 		return( 0 );
 
diff --git a/fuzz/sharpen_fuzzer.cc b/fuzz/sharpen_fuzzer.cc
index fffb1d0a..4dde781f 100644
--- a/fuzz/sharpen_fuzzer.cc
+++ b/fuzz/sharpen_fuzzer.cc
@@ -13,6 +13,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	VipsImage *image, *out;
 	double d;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(image = vips_image_new_from_buffer( data, size, "", NULL )) ) 
 		return( 0 );
 
diff --git a/fuzz/smartcrop_fuzzer.cc b/fuzz/smartcrop_fuzzer.cc
index 06828b10..af919cbf 100644
--- a/fuzz/smartcrop_fuzzer.cc
+++ b/fuzz/smartcrop_fuzzer.cc
@@ -13,6 +13,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	VipsImage *image, *out;
 	double d;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(image = vips_image_new_from_buffer( data, size, "", NULL )) )
 		return( 0 );
 
diff --git a/fuzz/thumbnail_fuzzer.cc b/fuzz/thumbnail_fuzzer.cc
index 8a21edac..de4a52c3 100644
--- a/fuzz/thumbnail_fuzzer.cc
+++ b/fuzz/thumbnail_fuzzer.cc
@@ -13,6 +13,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	VipsImage *image, *out;
 	double d;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(image = vips_image_new_from_buffer( data, size, "", NULL )) ) 
 		return( 0 );
 
diff --git a/fuzz/webpsave_buffer_fuzzer.cc b/fuzz/webpsave_buffer_fuzzer.cc
index 931645c2..d5ae3f60 100644
--- a/fuzz/webpsave_buffer_fuzzer.cc
+++ b/fuzz/webpsave_buffer_fuzzer.cc
@@ -14,6 +14,9 @@ LLVMFuzzerTestOneInput( const guint8 *data, size_t size )
 	void *buf;
 	size_t len;
 
+	if( size > 100 * 1024 * 1024 )
+		return( 0 );
+
 	if( !(image = vips_image_new_from_buffer( data, size, "", NULL )) ) 
 		return( 0 );