diff --git a/.appveyor.yml b/.appveyor.yml
index 92a0dd6f..2da0ed7f 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -39,7 +39,7 @@ before_build:
   - if %linking%==static ( set CMAKE_FLAGS=-DBUILD_SHARED_LIBS=OFF )
   - if %compiler%==mingw ( set "outdir=build\out" ) else ( set "outdir=build\out\Release" )
   - ren "C:\Program Files\Git\usr\bin\sh.exe" _sh.exe
-  - set "simultaneous=2"
+  - set "simultaneous=3"
 
 build_script:
   - md build && cd build