diff --git a/makefile b/makefile
index 7291f34..cb4bf00 100644
--- a/makefile
+++ b/makefile
@@ -1,3 +1,4 @@
+NUMCORES = ${NUMBER_OF_PROCESSORS}
 LIBFLAGS = -shared -std=c++11 -O3 -fPIC -Wall
 EXEFLAGS = -Wall -std=c++11 -O3 -Wl,-rpath,'$$ORIGIN/lib'
 LINKEDLIBS = -lgmp -lgmpxx
@@ -6,10 +7,10 @@ PROBLEM_FILES = $(patsubst %,Source/libProblem%.cpp,$(PROBLEM_NUMBERS))
 LIBDIR = ./lib
 LIBS = $(patsubst %, -lProblem%,$(PROBLEM_NUMBERS))
 
-all: libs ProjectEuler
+all: libsMulti ProjectEuler
 libs: directory $(patsubst %, $(LIBDIR)/libProblem%.so,$(PROBLEM_NUMBERS))
 windows: allWindows
-allWindows: libsWindows ProjectEuler moveBin
+allWindows: libsWindowsMulti ProjectEuler moveBin
 libsWindows: directory $(patsubst %, $(LIBDIR)/libProblem%.a,$(PROBLEM_NUMBERS))
 
 #Non-build jobs
@@ -22,10 +23,14 @@ moveBin:
 #Building the Libraries
 $(LIBDIR)/libProblem%.so: Source/Problem%.cpp
 	$(CXX) $(LIBFLAGS) -o $@ $< $(LINKEDLIBS)
+libsMulti:
+	$(MAKE) libs -j $(NUMCORES)
 
 #Building the Libraries for Windows
 $(LIBDIR)/libProblem%.a: Source/Problem%.cpp
 	$(CXX) $(LIBFLAGS) -o $@ $< $(LINKEDLIBS)
+libsWindowsMulti:
+	$(MAKE) libsWindows -j $(NUMCORES)
 
 #Building the executable
 ProjectEuler: main.cpp