diff --git a/.gitmodules b/.gitmodules
index 71242f28..78114a52 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -34,3 +34,6 @@
 [submodule "Algorithms/deps/QuickXorHash"]
 	path = Algorithms/deps/QuickXorHash
 	url = https://github.com/namazso/QuickXorHash.git
+[submodule "compile-time-regular-expressions"]
+	path = compile-time-regular-expressions
+	url = https://github.com/hanickadot/compile-time-regular-expressions.git
diff --git a/OpenHashTab/OpenHashTab.vcxproj b/OpenHashTab/OpenHashTab.vcxproj
index df71e728..339324fe 100644
--- a/OpenHashTab/OpenHashTab.vcxproj
+++ b/OpenHashTab/OpenHashTab.vcxproj
@@ -64,14 +64,14 @@
   <PropertyGroup Label="UserMacros" />
   <PropertyGroup>
     <IgnoreImportLibrary>true</IgnoreImportLibrary>
-    <IncludePath>$(SolutionDir)concurrentqueue;$(SolutionDir)phnt;$(SolutionDir)tiny-json;$(IncludePath)</IncludePath>
+    <IncludePath>$(SolutionDir)concurrentqueue;$(SolutionDir)phnt;$(SolutionDir)tiny-json;$(SolutionDir)compile-time-regular-expressions\include;$(IncludePath)</IncludePath>
     <OutDir>$(SolutionDir)bin\$(Configuration)\$(Platform)\</OutDir>
   </PropertyGroup>
   <ItemDefinitionGroup>
     <ClCompile>
       <PreprocessorDefinitions>CI_VERSION="$(CI_VERSION)";CI_VERSION_MAJOR=$(CI_VERSION_MAJOR);CI_VERSION_MINOR=$(CI_VERSION_MINOR);CI_VERSION_PATCH=$(CI_VERSION_PATCH);%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <RuntimeTypeInfo>false</RuntimeTypeInfo>
-      <LanguageStandard>stdcpp17</LanguageStandard>
+      <LanguageStandard>stdcpp20</LanguageStandard>
       <PrecompiledHeader>Use</PrecompiledHeader>
     </ClCompile>
     <Midl>
diff --git a/OpenHashTab/SumFileParser.cpp b/OpenHashTab/SumFileParser.cpp
index 921d2f66..ae43c648 100644
--- a/OpenHashTab/SumFileParser.cpp
+++ b/OpenHashTab/SumFileParser.cpp
@@ -17,23 +17,19 @@
 
 #include "SumFileParser.h"
 
-#include <regex>
+#include <ctre-unicode.hpp>
 #include <string_view>
 
 #include "base64.h"
 #include "utl.h"
 #include "../AlgorithmsLoader/Hasher.h"
 
-constexpr char k_regex_hex[] = R"(([0-9a-fA-F]{8,512}) [ \*](.+))";
-constexpr char k_regex_b64[] = R"(([0-9a-zA-Z=+\/,\-_]{6,512}) [ \*](.+))";
-constexpr char k_regex_sfv[] = R"((.+)\s+([0-9a-fA-F]{8}))";
+auto k_regex_hex = ctre::match<R"(([0-9a-fA-F]{8,512}) [ \*](.+))">;
+auto k_regex_b64 = ctre::match<R"(([0-9a-zA-Z=+\/,\-_]{6,512}) [ \*](.+))">;
+auto k_regex_sfv = ctre::match<R"((.+)\s+([0-9a-fA-F]{8}))">;
 
 class SumFileParser2
 {
-  std::regex _hex{ k_regex_hex };
-  std::regex _b64{ k_regex_b64 };
-  std::regex _sfv{ k_regex_sfv };
-
   enum class CommentStyle
   {
     Unknown,
@@ -54,8 +50,6 @@ class SumFileParser2
 
   bool ProcessLine(std::string_view sv)
   {
-    using svmatch = std::match_results<std::string_view::iterator>;
-
     if (sv.find_first_not_of("\r\n\t\f\v ") == std::string_view::npos)
       return true; // empty line
 
@@ -73,15 +67,13 @@ class SumFileParser2
 
     if ((_hash == HashStyle::Unknown || _hash == HashStyle::Sfv))
     {
-      svmatch pieces;
-      if(std::regex_match(begin(sv), end(sv), pieces, _sfv))
+      if(auto [whole, file_match, hash_str] = k_regex_sfv(sv); whole)
       {
         _hash = HashStyle::Sfv;
-        auto file = pieces[1].str();
         // According to wikipedia delimiter is always space.
+        auto file = std::string(file_match);
         const auto notspace = file.find_last_not_of(' ');
         file.resize(notspace == std::string_view::npos ? 0 : notspace + 1);
-        const auto hash_str = pieces[2].str();
         auto hash = utl::HashStringToBytes(std::string_view{ hash_str });
         if (!hash.empty())
         {
@@ -93,15 +85,13 @@ class SumFileParser2
 
     if ((_hash == HashStyle::Unknown || _hash == HashStyle::Hex))
     {
-      svmatch pieces;
-      if (std::regex_match(begin(sv), end(sv), pieces, _hex))
+      if (auto [whole, hash_str, file] = k_regex_hex(sv); whole)
       {
         _hash = HashStyle::Hex;
-        const auto hash_str = pieces[1].str();
         auto hash = utl::HashStringToBytes(std::string_view{ hash_str });
         if (!hash.empty())
         {
-          files.emplace_back(pieces[2], std::move(hash));
+          files.emplace_back(file, std::move(hash));
           return true;
         }
       }
@@ -109,15 +99,14 @@ class SumFileParser2
 
     if ((_hash == HashStyle::Unknown || _hash == HashStyle::Base64))
     {
-      svmatch pieces;
-      if (std::regex_match(begin(sv), end(sv), pieces, _b64))
+      if (auto [whole, hash_match, file] = k_regex_hex(sv); whole)
       {
         _hash = HashStyle::Base64;
-        const auto str = pieces[1].str();
-        auto hash = b64::decode(str.c_str(), str.size());
+        const auto hash_str = std::string(hash_match);
+        auto hash = b64::decode(hash_str.c_str(), hash_str.size());
         if (!hash.empty())
         {
-          files.emplace_back(pieces[2], std::move(hash));
+          files.emplace_back(file, std::move(hash));
           return true;
         }
       }
diff --git a/OpenHashTab/utl.cpp b/OpenHashTab/utl.cpp
index c0c2f349..88db00f2 100644
--- a/OpenHashTab/utl.cpp
+++ b/OpenHashTab/utl.cpp
@@ -18,7 +18,7 @@
 #include "utl.h"
 
 #include <memory>
-#include <regex>
+#include <ctre-unicode.hpp>
 
 #include "Settings.h"
 
@@ -35,13 +35,10 @@ extern "C" NTSTATUS NTAPI RtlLoadString(
 
 std::vector<uint8_t> utl::FindHashInString(std::wstring_view wv)
 {
-  using wvmatch = std::match_results<std::wstring_view::iterator>;
-  constexpr static wchar_t regex_str[] = LR"(((?:[0-9A-F]{2} ?){4,}|(?:[0-9a-f]{2} ?){4,}))";
-  static std::wregex regex{ regex_str };
-
-  wvmatch pieces;
-  if (std::regex_search(begin(wv), end(wv), pieces, regex))
-    return HashStringToBytes(std::wstring_view{ pieces[1].str() });
+  static auto regex = ctre::match<LR"(((?:[0-9A-F]{2} ?){4,}|(?:[0-9a-f]{2} ?){4,}))">;
+  
+  if (auto [whole, hash] = regex(wv); whole)
+    return HashStringToBytes(std::wstring_view{ std::wstring(hash)});
   return {};
 }
 
diff --git a/compile-time-regular-expressions b/compile-time-regular-expressions
new file mode 160000
index 00000000..331aebc7
--- /dev/null
+++ b/compile-time-regular-expressions
@@ -0,0 +1 @@
+Subproject commit 331aebc79d715d1d0036d2d32021584eefecbcc9