diff --git a/CHANGELOG.md b/CHANGELOG.md
index 990f0e6..8329234 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,10 +1,13 @@
 # Changelog
 
-## LMDBAL 0.5.1 (UNRELEASED)
+## LMDBAL 0.5.1 (October 21, 2023)
 ### Improvements
 - RAII transactions
 - reduced overhead for private transaction finctions
 
+### Bug fixes
+- bug fix with cache fallthough
+
 ## LMDBAL 0.5.0 (October 15, 2023)
 ### New Features
 - duplicates support (only for table)
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4d73014..6825b0e 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -74,10 +74,7 @@ if (BUILD_TESTS)
   add_subdirectory(test)
 endif ()
 
-target_include_directories(${PROJECT_NAME} PUBLIC
-                           "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/src>"
-                           "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW}>"
-)
+target_include_directories(${PROJECT_NAME} PUBLIC "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW}>")
 target_include_directories(${PROJECT_NAME} PRIVATE ${Qt${QT_VERSION_MAJOR}_INCLUDE_DIRS})
 target_include_directories(${PROJECT_NAME} PRIVATE ${Qt${QT_VERSION_MAJOR}Core_INCLUDE_DIRS})
 
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 564a59b..2da5cd8 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -14,25 +14,13 @@ set(HEADERS
   cursor.hpp
   cache.h
   cache.hpp
-  serializer.h
-  serializer.hpp
-  serializer_uint8.hpp
-  serializer_uint16.hpp
-  serializer_uint32.hpp
-  serializer_uint64.hpp
-  serializer_int8.hpp
-  serializer_int16.hpp
-  serializer_int32.hpp
-  serializer_int64.hpp
-  serializer_float.hpp
-  serializer_double.hpp
-  serializer_stdstring.hpp
-  serializer_qstring.hpp
-  serializer_qbytearray.hpp
   operators.hpp
   transaction.h
 )
 
 target_sources(${PROJECT_NAME} PRIVATE ${SOURCES})
+target_include_directories(${PROJECT_NAME} PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>")
+
+add_subdirectory(serializer)
 
 install(FILES ${HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW})
diff --git a/src/cache.hpp b/src/cache.hpp
index 52b17de..e9ae0aa 100644
--- a/src/cache.hpp
+++ b/src/cache.hpp
@@ -841,27 +841,23 @@ void LMDBAL::Cache<K, V>::handleTransactionEntry(const Entry& entry) {
             std::pair<K, V>* pair = static_cast<std::pair<K, V>*>(entry.second);
             handleAddRecord(pair->first, pair->second);
             delete pair;
-        }
-            break;
+        }   break;
         case Operation::remove: {
             K* key = static_cast<K*>(entry.second);
             handleRemoveRecord(*key);
             delete key;
-        }
-
-            break;
+        }   break;
         case Operation::change: {
             std::pair<K, V>* pair = static_cast<std::pair<K, V>*>(entry.second);
             handleChangeRecord(pair->first, pair->second);
             delete pair;
-        }
+        }   break;
         case Operation::force: {
             std::tuple<bool, K, V>* tuple = static_cast<std::tuple<bool, K, V>*>(entry.second);
             const std::tuple<bool, K, V>& t = *tuple;
             handleForceRecord(std::get<1>(t), std::get<2>(t), std::get<0>(t));
             delete tuple;
-        }
-            break;
+        }   break;
         case Operation::drop:
             handleDrop();
             break;
@@ -873,8 +869,7 @@ void LMDBAL::Cache<K, V>::handleTransactionEntry(const Entry& entry) {
             const std::tuple<bool, SizeType, std::map<K, V>>& t = * tuple;
             handleAddRecords(std::get<2>(t), std::get<0>(t), std::get<1>(t));
             delete tuple;
-        }
-            break;
+        }   break;
     }
 }
 
diff --git a/src/serializer/CMakeLists.txt b/src/serializer/CMakeLists.txt
new file mode 100644
index 0000000..f4148e9
--- /dev/null
+++ b/src/serializer/CMakeLists.txt
@@ -0,0 +1,21 @@
+set(HEADERS
+  serializer.h
+  serializer.hpp
+  serializer_uint8.hpp
+  serializer_uint16.hpp
+  serializer_uint32.hpp
+  serializer_uint64.hpp
+  serializer_int8.hpp
+  serializer_int16.hpp
+  serializer_int32.hpp
+  serializer_int64.hpp
+  serializer_float.hpp
+  serializer_double.hpp
+  serializer_stdstring.hpp
+  serializer_qstring.hpp
+  serializer_qbytearray.hpp
+)
+
+target_include_directories(${PROJECT_NAME} PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}>")
+
+install(FILES ${HEADERS} DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}/${PROJECT_LOW})
diff --git a/src/serializer.h b/src/serializer/serializer.h
similarity index 100%
rename from src/serializer.h
rename to src/serializer/serializer.h
diff --git a/src/serializer.hpp b/src/serializer/serializer.hpp
similarity index 100%
rename from src/serializer.hpp
rename to src/serializer/serializer.hpp
diff --git a/src/serializer_double.hpp b/src/serializer/serializer_double.hpp
similarity index 100%
rename from src/serializer_double.hpp
rename to src/serializer/serializer_double.hpp
diff --git a/src/serializer_float.hpp b/src/serializer/serializer_float.hpp
similarity index 100%
rename from src/serializer_float.hpp
rename to src/serializer/serializer_float.hpp
diff --git a/src/serializer_int16.hpp b/src/serializer/serializer_int16.hpp
similarity index 100%
rename from src/serializer_int16.hpp
rename to src/serializer/serializer_int16.hpp
diff --git a/src/serializer_int32.hpp b/src/serializer/serializer_int32.hpp
similarity index 100%
rename from src/serializer_int32.hpp
rename to src/serializer/serializer_int32.hpp
diff --git a/src/serializer_int64.hpp b/src/serializer/serializer_int64.hpp
similarity index 100%
rename from src/serializer_int64.hpp
rename to src/serializer/serializer_int64.hpp
diff --git a/src/serializer_int8.hpp b/src/serializer/serializer_int8.hpp
similarity index 100%
rename from src/serializer_int8.hpp
rename to src/serializer/serializer_int8.hpp
diff --git a/src/serializer_qbytearray.hpp b/src/serializer/serializer_qbytearray.hpp
similarity index 100%
rename from src/serializer_qbytearray.hpp
rename to src/serializer/serializer_qbytearray.hpp
diff --git a/src/serializer_qstring.hpp b/src/serializer/serializer_qstring.hpp
similarity index 100%
rename from src/serializer_qstring.hpp
rename to src/serializer/serializer_qstring.hpp
diff --git a/src/serializer_stdstring.hpp b/src/serializer/serializer_stdstring.hpp
similarity index 100%
rename from src/serializer_stdstring.hpp
rename to src/serializer/serializer_stdstring.hpp
diff --git a/src/serializer_uint16.hpp b/src/serializer/serializer_uint16.hpp
similarity index 100%
rename from src/serializer_uint16.hpp
rename to src/serializer/serializer_uint16.hpp
diff --git a/src/serializer_uint32.hpp b/src/serializer/serializer_uint32.hpp
similarity index 100%
rename from src/serializer_uint32.hpp
rename to src/serializer/serializer_uint32.hpp
diff --git a/src/serializer_uint64.hpp b/src/serializer/serializer_uint64.hpp
similarity index 100%
rename from src/serializer_uint64.hpp
rename to src/serializer/serializer_uint64.hpp
diff --git a/src/serializer_uint8.hpp b/src/serializer/serializer_uint8.hpp
similarity index 100%
rename from src/serializer_uint8.hpp
rename to src/serializer/serializer_uint8.hpp
diff --git a/test/CMakeLists.txt b/test/CMakeLists.txt
index ab59a88..3994aac 100644
--- a/test/CMakeLists.txt
+++ b/test/CMakeLists.txt
@@ -12,7 +12,7 @@ add_executable(runUnitTests
     duplicates.cpp
 )
 
-target_compile_options(runUnitTests PRIVATE -fPIC)
+target_compile_options(runUnitTests PRIVATE -fPIC -Wall -Wextra -O0)
 
 target_include_directories(runUnitTests PRIVATE ${CMAKE_SOURCE_DIR}/src)
 target_include_directories(runUnitTests PRIVATE ${Qt${QT_VERSION_MAJOR}_INCLUDE_DIRS})
diff --git a/test/storagetransaction.cpp b/test/storagetransaction.cpp
index ad21846..4f04931 100644
--- a/test/storagetransaction.cpp
+++ b/test/storagetransaction.cpp
@@ -181,6 +181,7 @@ TEST_F(StorageTransactionsTest, ConcurentModification) {
 
     int pid = fork();
     if (pid == 0) {  // I am the child
+        usleep(1);
         std::cout << "beggining second transaction" << std::endl;
         LMDBAL::WriteTransaction txn2 = db->beginTransaction();     //<--- this is where the execution should pause
                                                                     //and wait for the first transaction to get finished
@@ -233,6 +234,7 @@ TEST_F(StorageTransactionsTest, RAIIResourceFree) {
 
     int pid = fork();
     if (pid == 0) {  // I am the child
+        usleep(1);
         std::cout << "beggining child transaction" << std::endl;
         LMDBAL::WriteTransaction txn2 = db->beginTransaction();     //<--- this is where the execution should pause
                                                                     //and wait for the first transaction to get finished