diff --git a/.gitignore b/.gitignore
index 675fd329..70c95e13 100644
--- a/.gitignore
+++ b/.gitignore
@@ -12,9 +12,7 @@
 *.pch
 
 # Compiled Dynamic libraries
-*.so
 *.dylib
-*.dll
 
 # Fortran module files
 *.mod
@@ -23,8 +21,6 @@
 # Compiled Static libraries
 *.lai
 *.la
-*.a
-*.lib
 
 # Executables
 *.exe
diff --git a/lib/windows/dnacalib.dll b/lib/windows/dnacalib.dll
new file mode 100644
index 00000000..13fd27ad
Binary files /dev/null and b/lib/windows/dnacalib.dll differ