diff --git a/.gitignore b/.gitignore
index 61bc857..0a08227 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,4 +4,5 @@
 /xasm.html
 /xasm.1
 /MANIFEST
+/.dub
 /.project
diff --git a/.travis.yml b/.travis.yml
new file mode 100644
index 0000000..62d0c9e
--- /dev/null
+++ b/.travis.yml
@@ -0,0 +1 @@
+language: d
diff --git a/Makefile b/Makefile
index 3967af9..71f1b75 100644
--- a/Makefile
+++ b/Makefile
@@ -8,7 +8,7 @@ SEVENZIP = 7z a -mx=9 -bd
 
 all: xasm xasm.html
 
-xasm: xasm.d
+xasm: source/xasm.d
 	dmd -of$@ -O -release $<
 
 xasm.html: xasm.1.asciidoc
@@ -49,7 +49,7 @@ osx: ../xasm-$(VERSION)-osx.dmg
 ../xasm-$(VERSION)-osx.dmg: osx/xasm osx/bin
 	hdiutil create -volname xasm-$(VERSION)-osx -srcfolder osx -imagekey zlib-level=9 -ov $@
 
-osx/xasm: xasm.d
+osx/xasm: source/xasm.d
 	mkdir -p osx && dmd -of$@ -O -release -m32 -L-macosx_version_min -L10.6 $< && rm -f osx/xasm.o
 
 osx/bin:
diff --git a/dub.sdl b/dub.sdl
new file mode 100644
index 0000000..5648fe0
--- /dev/null
+++ b/dub.sdl
@@ -0,0 +1,6 @@
+name "xasm"
+description "6502 cross-assembler with original syntax extensions"
+authors "Piotr Fusik"
+copyright "Copyright © 1998-2019, Piotr Fusik"
+license "poetic"
+targetType "executable"
diff --git a/xasm.d b/source/xasm.d
similarity index 100%
rename from xasm.d
rename to source/xasm.d