diff --git a/.gitignore b/.gitignore
index 7df9ce2..c7d6359 100644
--- a/.gitignore
+++ b/.gitignore
@@ -40,7 +40,7 @@
 # debug information files
 *.dwo
 
-sim
+luna
 .cache/
 
 # created via bear -- make
diff --git a/Makefile b/Makefile
index f01ae09..ec296fb 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ SRC = src/main.cpp \
       src/sims/two_bodies.cpp \
       src/utils/rand.cpp
 
-OUT = sim
+OUT = luna
 
 $(OUT): $(SRC)
 	$(CXX) $(CXXFLAGS) $(SRC) -o $(OUT) $(LDFLAGS)
diff --git a/README.md b/README.md
index ae6404c..c2960fc 100644
--- a/README.md
+++ b/README.md
@@ -1 +1 @@
-# sim
\ No newline at end of file
+# luna