diff --git a/makefile b/makefile
index d0e2ba8..89beca6 100644
--- a/makefile
+++ b/makefile
@@ -14,7 +14,7 @@ libs: directory $(patsubst %, $(LIBDIR)/libProblem%.so,$(PROBLEM_NUMBERS))
 #Windows makes
 windows: allWindows
 allWindows: libsWindowsMulti ProjectEuler moveBin
-libsWindows: directory $(patsubst %, $(LIBDIR)/libProblem%.a,$(PROBLEM_NUMBERS))
+libsWindows: directory $(patsubst %, $(LIBDIR)/libProblem%.dll,$(PROBLEM_NUMBERS))
 
 #Non-build jobs
 directory:
@@ -30,7 +30,7 @@ libsMulti:
 	$(MAKE) libs -j $(NUMCORES)
 
 #Building the Libraries for Windows
-$(LIBDIR)/libProblem%.a: Source/Problem%.cpp
+$(LIBDIR)/libProblem%.dll: Source/Problem%.cpp
 	$(CXX) $(LIBFLAGS) -o $@ $< $(LINKEDLIBS)
 libsWindowsMulti:
 	$(MAKE) libsWindows -j $(NUMCORESWIN)