diff --git a/src/travis/windows-x86-before-install.sh b/src/travis/windows-x86-before-install.sh
index 581a97d2..9bf65cf5 100755
--- a/src/travis/windows-x86-before-install.sh
+++ b/src/travis/windows-x86-before-install.sh
@@ -1,5 +1,8 @@
 echo "Installing Net-Framework-Core..."
 export mypath=$(pwd)
+
+choco upgrade all
+
 until powershell Install-WindowsFeature Net-Framework-Core; do echo "trying again..."; done
 cd ~
 export exefile=Win32OpenSSL_Light-${BUILD_OPENSSL_VERSION//./_}.exe
@@ -36,10 +39,6 @@ tar xf develop.tar.gz
 cd pyinstaller-develop/bootloader
 echo "bootloader before:"
 md5sum ../PyInstaller/bootloader/Windows-32bit/*
-
-# hack to fix compile on Travis
-perl -i -p0e 's/#ifndef HAVE_STRLEN.*?#endif//se' src/pyi_utils.*
-
 $python ./waf all --target-arch=32bit
 echo "bootloader after:"
 md5sum ../PyInstaller/bootloader/Windows-32bit/*
diff --git a/src/travis/windows-x86_64-before-install.sh b/src/travis/windows-x86_64-before-install.sh
index a55dc2db..41623b5c 100755
--- a/src/travis/windows-x86_64-before-install.sh
+++ b/src/travis/windows-x86_64-before-install.sh
@@ -1,5 +1,8 @@
 echo "Installing Net-Framework-Core..."
 export mypath=$(pwd)
+
+choco upgrade all
+
 until powershell Install-WindowsFeature Net-Framework-Core; do echo "trying again..."; done
 cd ~
 export exefile=Win64OpenSSL_Light-${BUILD_OPENSSL_VERSION//./_}.exe
@@ -39,9 +42,6 @@ cd pyinstaller-develop/bootloader
 echo "bootloader before:"
 md5sum ../PyInstaller/bootloader/Windows-64bit/*
 
-# hack to fix compile on Travis
-perl -i -p0e 's/#ifndef HAVE_STRLEN.*?#endif//se' src/pyi_utils.*
-
 $python ./waf all --target-arch=64bit
 cat build/config.log