diff --git a/.appveyor.yml b/.appveyor.yml
index dedfb4c..cac38a1 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -5,21 +5,21 @@ skip_branch_with_pr: false
 
 environment:
   matrix:
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     arch: x64
     platform: x64
-    qtbin: msvc2019_64
-  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2019
+    qtbin: msvc2017_64
+  - APPVEYOR_BUILD_WORKER_IMAGE: Visual Studio 2017
     arch: x86
     platform: Win32
-    qtbin: msvc2019
+    qtbin: msvc2017
 
 before_build:
   - git submodule update --init
   - cd C:\
   - mkdir %arch%
   - cd %arch%
-  - cmake -G "Visual Studio 16 2019" -A "%platform%" -DQt5_DIR="C:\Qt\5.15\%qtbin%\lib\cmake\Qt5" -DCMAKE_BUILD_TYPE="RelWithDebInfo" -DVERSION="" ../Textractor
+  - cmake -G "Visual Studio 15 2017" -A %platform% -DQt5_DIR="C:\Qt\5.13.2\%qtbin%\lib\cmake\Qt5" -DCMAKE_BUILD_TYPE="RelWithDebInfo" -DVERSION="" ../Textractor
 
 build:
   project: C:\%arch%\Textractor.sln
diff --git a/extensions/blockmarkup.h b/extensions/blockmarkup.h
index a6fe5ba..091a044 100644
--- a/extensions/blockmarkup.h
+++ b/extensions/blockmarkup.h
@@ -49,7 +49,7 @@ private:
 	}
 
 	static constexpr C endImpl[5] = { '|', 'E', 'N', 'D', '|' };
-	static constexpr std::basic_string_view end{ endImpl, 5 };
+	static constexpr std::basic_string_view<C> end{ endImpl, 5 };
 
 	std::basic_streambuf<char>& streambuf;
 	std::basic_string<C> buffer;
diff --git a/extensions/regexreplacer.cpp b/extensions/regexreplacer.cpp
index 4e667b1..be6d28d 100644
--- a/extensions/regexreplacer.cpp
+++ b/extensions/regexreplacer.cpp
@@ -2,6 +2,7 @@
 #include "module.h"
 #include "blockmarkup.h"
 #include <fstream>
+#include <process.h>
 
 extern const wchar_t* REGEX_REPLACER_INSTRUCTIONS;