diff --git a/src/Common/Config/ConfigProcessor.cpp b/src/Common/Config/ConfigProcessor.cpp
index 149de3cfcbf..957934770e7 100644
--- a/src/Common/Config/ConfigProcessor.cpp
+++ b/src/Common/Config/ConfigProcessor.cpp
@@ -424,20 +424,19 @@ ConfigProcessor::Files ConfigProcessor::getConfigMergeFiles(const std::string &
 
     for (const std::string & merge_dir_name : merge_dirs)
     {
-        Poco::File merge_dir(merge_dir_name);
-        if (!merge_dir.exists() || !merge_dir.isDirectory())
+        fs::path merge_dir(merge_dir_name);
+        if (!fs::exists(merge_dir) || !is_directory(merge_dir))
             continue;
 
-        for (Poco::DirectoryIterator it(merge_dir_name); it != Poco::DirectoryIterator(); ++it)
+        for (fs::directory_iterator it(merge_dir_name); it != fs::directory_iterator(); ++it)
         {
-            Poco::File & file = *it;
-            Poco::Path path(file.path());
-            std::string extension = path.getExtension();
-            std::string base_name = path.getBaseName();
+            fs::path path(it->path());
+            std::string extension = path.extension();
+            std::string base_name = path.stem();
 
             // Skip non-config and temporary files
-            if (file.isFile() && (extension == "xml" || extension == "conf") && !startsWith(base_name, "."))
-                files.push_back(file.path());
+            if (fs::is_regular_file(path) && (extension == ".xml" || extension == ".conf") && !startsWith(base_name, "."))
+                files.push_back(it->path());
         }
     }
 
@@ -512,7 +511,7 @@ XMLDocumentPtr ConfigProcessor::processConfig(
         else
         {
             std::string default_path = "/etc/metrika.xml";
-            if (Poco::File(default_path).exists())
+            if (fs::exists(default_path))
                 include_from_path = default_path;
         }
         if (!include_from_path.empty())
diff --git a/src/Dictionaries/Embedded/GeodataProviders/HierarchiesProvider.cpp b/src/Dictionaries/Embedded/GeodataProviders/HierarchiesProvider.cpp
index 3b8848ab19b..7257caa066f 100644
--- a/src/Dictionaries/Embedded/GeodataProviders/HierarchiesProvider.cpp
+++ b/src/Dictionaries/Embedded/GeodataProviders/HierarchiesProvider.cpp
@@ -5,7 +5,9 @@
 #include <Poco/Exception.h>
 #include <Poco/Util/Application.h>
 #include "HierarchyFormatReader.h"
+#include <filesystem>
 
+namespace fs = std::filesystem;
 
 bool RegionsHierarchyDataSource::isModified() const
 {
@@ -27,7 +29,7 @@ RegionsHierarchiesDataProvider::RegionsHierarchiesDataProvider(const std::string
 
 void RegionsHierarchiesDataProvider::discoverFilesWithCustomHierarchies()
 {
-    std::string basename = Poco::Path(path).getBaseName();
+    std::string basename = fs::path(path).stem();
 
     Poco::Path dir_path = Poco::Path(path).absolute().parent();
 
diff --git a/src/Dictionaries/Embedded/GeodataProviders/NamesProvider.cpp b/src/Dictionaries/Embedded/GeodataProviders/NamesProvider.cpp
index f3e49545481..5f79fda070f 100644
--- a/src/Dictionaries/Embedded/GeodataProviders/NamesProvider.cpp
+++ b/src/Dictionaries/Embedded/GeodataProviders/NamesProvider.cpp
@@ -2,7 +2,9 @@
 
 #include <IO/ReadBufferFromFile.h>
 #include "NamesFormatReader.h"
+#include <filesystem>
 
+namespace fs = std::filesystem;
 
 bool LanguageRegionsNamesDataSource::isModified() const
 {
@@ -11,7 +13,7 @@ bool LanguageRegionsNamesDataSource::isModified() const
 
 size_t LanguageRegionsNamesDataSource::estimateTotalSize() const
 {
-    return Poco::File(path).getSize();
+    return fs::file_size(path);
 }
 
 ILanguageRegionsNamesReaderPtr LanguageRegionsNamesDataSource::createReader()
@@ -39,7 +41,7 @@ RegionsNamesDataProvider::RegionsNamesDataProvider(const std::string & directory
 ILanguageRegionsNamesDataSourcePtr RegionsNamesDataProvider::getLanguageRegionsNamesSource(const std::string & language) const
 {
     const auto data_file = getDataFilePath(language);
-    if (Poco::File(data_file).exists())
+    if (fs::exists(data_file))
         return std::make_unique<LanguageRegionsNamesDataSource>(data_file, language);
     else
         return {};
diff --git a/src/Dictionaries/FileDictionarySource.cpp b/src/Dictionaries/FileDictionarySource.cpp
index 378c6f11857..d4bcc97d563 100644
--- a/src/Dictionaries/FileDictionarySource.cpp
+++ b/src/Dictionaries/FileDictionarySource.cpp
@@ -12,6 +12,9 @@
 #include "DictionaryStructure.h"
 #include "registerDictionaries.h"
 #include "DictionarySourceHelpers.h"
+#include <filesystem>
+
+namespace fs = std::filesystem;
 
 namespace DB
 {
@@ -80,9 +83,12 @@ std::string FileDictionarySource::toString() const
 
 Poco::Timestamp FileDictionarySource::getLastModification() const
 {
-    return Poco::File{filepath}.getLastModified();
+    fs::file_time_type fs_time = fs::last_write_time(filepath);
+    auto micro_sec = std::chrono::duration_cast<std::chrono::microseconds>(fs_time.time_since_epoch());
+    return Poco::Timestamp(micro_sec.count());
 }
 
+
 void registerDictionarySourceFile(DictionarySourceFactory & factory)
 {
     auto create_table_source = [=](const DictionaryStructure & dict_struct,
diff --git a/src/Dictionaries/LibraryDictionarySource.cpp b/src/Dictionaries/LibraryDictionarySource.cpp
index a971ba4b1be..ce580d6b803 100644
--- a/src/Dictionaries/LibraryDictionarySource.cpp
+++ b/src/Dictionaries/LibraryDictionarySource.cpp
@@ -2,7 +2,6 @@
 
 #include <DataStreams/OneBlockInputStream.h>
 #include <Interpreters/Context.h>
-#include <Poco/File.h>
 #include <common/logger_useful.h>
 #include <ext/bit_cast.h>
 #include <ext/range.h>
@@ -13,7 +12,9 @@
 #include "registerDictionaries.h"
 #include <IO/WriteBufferFromString.h>
 #include <IO/WriteHelpers.h>
+#include <filesystem>
 
+namespace fs = std::filesystem;
 
 namespace DB
 {
@@ -49,8 +50,8 @@ LibraryDictionarySource::LibraryDictionarySource(
             throw Exception(ErrorCodes::PATH_ACCESS_DENIED, "LibraryDictionarySource: Library path {} is not inside {}", path, dictionaries_lib_path);
     }
 
-    if (!Poco::File(path).exists())
-        throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "LibraryDictionarySource: Can't load library {}: file doesn't exist", Poco::File(path).path());
+    if (!fs::exists(path))
+        throw Exception(ErrorCodes::FILE_DOESNT_EXIST, "LibraryDictionarySource: Can't load library {}: file doesn't exist", path);
 
     description.init(sample_block);
     bridge_helper = std::make_shared<LibraryBridgeHelper>(context, description.sample_block, dictionary_id);