diff --git a/src/CryDevice.h b/src/CryDevice.h
index dcdbc8f1..ffe44d43 100644
--- a/src/CryDevice.h
+++ b/src/CryDevice.h
@@ -18,7 +18,7 @@ namespace bf = boost::filesystem;
 
 class CryDevice: public fspp::Device {
 public:
-  static constexpr uint32_t BLOCKSIZE_BYTES = 4096;
+  static constexpr uint32_t BLOCKSIZE_BYTES = 8 * 1024;
 
   CryDevice(std::unique_ptr<CryConfig> config, std::unique_ptr<blockstore::BlockStore> blockStore);
   virtual ~CryDevice();