diff --git a/src/database/env_esp.cpp b/src/database/env_esp.cpp
index 62d0a645..8cddd09a 100644
--- a/src/database/env_esp.cpp
+++ b/src/database/env_esp.cpp
@@ -36,6 +36,7 @@
 #include "leveldb/slice.h"
 #include "leveldb/status.h"
 
+#include "spi.hpp"
 #include "tasks.hpp"
 
 namespace leveldb {
@@ -101,9 +102,13 @@ class EspSequentialFile final : public SequentialFile {
  public:
   EspSequentialFile(const std::string& filename, FIL file)
       : file_(file), filename_(filename) {}
-  ~EspSequentialFile() override { f_close(&file_); }
+  ~EspSequentialFile() override {
+    auto lock = drivers::acquire_spi();
+    f_close(&file_);
+  }
 
   Status Read(size_t n, Slice* result, char* scratch) override {
+    auto lock = drivers::acquire_spi();
     UINT read_size = 0;
     FRESULT res = f_read(&file_, scratch, n, &read_size);
     if (res != FR_OK) {  // Read error.
@@ -114,6 +119,7 @@ class EspSequentialFile final : public SequentialFile {
   }
 
   Status Skip(uint64_t n) override {
+    auto lock = drivers::acquire_spi();
     DWORD current_pos = f_tell(&file_);
     FRESULT res = f_lseek(&file_, current_pos + n);
     if (res != FR_OK) {
@@ -145,6 +151,7 @@ class EspRandomAccessFile final : public RandomAccessFile {
               size_t n,
               Slice* result,
               char* scratch) const override {
+    auto lock = drivers::acquire_spi();
     FIL file;
     FRESULT res = f_open(&file, filename_.c_str(), FA_READ);
     if (res != FR_OK) {
@@ -193,6 +200,7 @@ class EspWritableFile final : public WritableFile {
       return EspError(filename_, FR_NOT_ENABLED);
     }
 
+    auto lock = drivers::acquire_spi();
     size_t write_size = data.size();
     const char* write_data = data.data();
 
@@ -206,6 +214,7 @@ class EspWritableFile final : public WritableFile {
   }
 
   Status Close() override {
+    auto lock = drivers::acquire_spi();
     is_open_ = false;
     FRESULT res = f_close(&file_);
     if (res != FR_OK) {
@@ -220,6 +229,7 @@ class EspWritableFile final : public WritableFile {
     if (!is_open_) {
       return EspError(filename_, FR_NOT_ENABLED);
     }
+    auto lock = drivers::acquire_spi();
     FRESULT res = f_sync(&file_);
     if (res != FR_OK) {
       return EspError(filename_, res);
@@ -275,6 +285,7 @@ EspEnv::~EspEnv() {
 
 Status EspEnv::NewSequentialFile(const std::string& filename,
                                  SequentialFile** result) {
+  auto lock = drivers::acquire_spi();
   FIL file;
   FRESULT res = f_open(&file, filename.c_str(), FA_READ);
   if (res != FR_OK) {
@@ -288,6 +299,7 @@ Status EspEnv::NewSequentialFile(const std::string& filename,
 
 Status EspEnv::NewRandomAccessFile(const std::string& filename,
                                    RandomAccessFile** result) {
+  auto lock = drivers::acquire_spi();
   // EspRandomAccessFile doesn't try to open the file until it's needed, so
   // we need to first ensure the file exists to handle the NotFound case
   // correctly.
@@ -304,6 +316,7 @@ Status EspEnv::NewRandomAccessFile(const std::string& filename,
 
 Status EspEnv::NewWritableFile(const std::string& filename,
                                WritableFile** result) {
+  auto lock = drivers::acquire_spi();
   FIL file;
   FRESULT res = f_open(&file, filename.c_str(), FA_WRITE | FA_CREATE_ALWAYS);
   if (res != FR_OK) {
@@ -317,6 +330,7 @@ Status EspEnv::NewWritableFile(const std::string& filename,
 
 Status EspEnv::NewAppendableFile(const std::string& filename,
                                  WritableFile** result) {
+  auto lock = drivers::acquire_spi();
   FIL file;
   FRESULT res = f_open(&file, filename.c_str(), FA_WRITE | FA_OPEN_APPEND);
   if (res != FR_OK) {
@@ -329,6 +343,7 @@ Status EspEnv::NewAppendableFile(const std::string& filename,
 }
 
 bool EspEnv::FileExists(const std::string& filename) {
+  auto lock = drivers::acquire_spi();
   FILINFO info;
   return f_stat(filename.c_str(), &info) == FR_OK;
 }
@@ -337,6 +352,7 @@ Status EspEnv::GetChildren(const std::string& directory_path,
                            std::vector<std::string>* result) {
   result->clear();
 
+  auto lock = drivers::acquire_spi();
   FF_DIR dir;
   FRESULT res = f_opendir(&dir, directory_path.c_str());
   if (res != FR_OK) {
@@ -364,6 +380,7 @@ Status EspEnv::GetChildren(const std::string& directory_path,
 }
 
 Status EspEnv::RemoveFile(const std::string& filename) {
+  auto lock = drivers::acquire_spi();
   FRESULT res = f_unlink(filename.c_str());
   if (res != FR_OK) {
     return EspError(filename, res);
@@ -372,6 +389,7 @@ Status EspEnv::RemoveFile(const std::string& filename) {
 }
 
 Status EspEnv::CreateDir(const std::string& dirname) {
+  auto lock = drivers::acquire_spi();
   FRESULT res = f_mkdir(dirname.c_str());
   if (res != FR_OK) {
     return EspError(dirname, res);
@@ -384,6 +402,7 @@ Status EspEnv::RemoveDir(const std::string& dirname) {
 }
 
 Status EspEnv::GetFileSize(const std::string& filename, uint64_t* size) {
+  auto lock = drivers::acquire_spi();
   FILINFO info;
   FRESULT res = f_stat(filename.c_str(), &info);
   if (res != FR_OK) {
@@ -402,6 +421,7 @@ Status EspEnv::RenameFile(const std::string& from, const std::string& to) {
       return s;
     }
   }
+  auto lock = drivers::acquire_spi();
   FRESULT res = f_rename(from.c_str(), to.c_str());
   if (res != FR_OK) {
     return EspError(from, res);
@@ -440,6 +460,7 @@ Status EspEnv::GetTestDirectory(std::string* result) {
 }
 
 Status EspEnv::NewLogger(const std::string& filename, Logger** result) {
+  auto lock = drivers::acquire_spi();
   FIL file;
   FRESULT res = f_open(&file, filename.c_str(), FA_WRITE | FA_OPEN_APPEND);
   if (res != FR_OK) {