diff --git a/node-to-rust/Makefile b/node-to-rust/Makefile
index b8898b2..e6af8a5 100644
--- a/node-to-rust/Makefile
+++ b/node-to-rust/Makefile
@@ -1,9 +1,15 @@
-all: target/libdouble_input.so
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
+all: target/libdouble_input.$(EXT)
 	node src/main.js
 
-target/libdouble_input.so: src/lib.rs Cargo.toml
+target/libdouble_input.$(EXT): src/lib.rs Cargo.toml
 	cargo build
-	(cd target && ln -nsf debug/libdouble_input-* libdouble_input.so)
+	(cd target && ln -nsf debug/libdouble_input-*$(EXT) libdouble_input.$(EXT))
 
 clean:
 	rm -rf target
diff --git a/node-to-rust/src/main.js b/node-to-rust/src/main.js
index 4ffec4b..0748788 100644
--- a/node-to-rust/src/main.js
+++ b/node-to-rust/src/main.js
@@ -1,6 +1,6 @@
 var ffi = require('ffi');
 
-var lib = ffi.Library('target/libdouble_input.so', {
+var lib = ffi.Library('target/libdouble_input', {
   'double_input': [ 'int', [ 'int' ] ]
 });
 
diff --git a/python-to-rust/Makefile b/python-to-rust/Makefile
index 583a843..9dd7bcb 100644
--- a/python-to-rust/Makefile
+++ b/python-to-rust/Makefile
@@ -1,9 +1,15 @@
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
 all: target/libdouble_input.so
 	python src/main.py
 
 target/libdouble_input.so: src/lib.rs Cargo.toml
 	cargo build
-	(cd target && ln -nsf debug/libdouble_input-* libdouble_input.so)
+	(cd target && ln -nsf debug/libdouble_input-*$(EXT) libdouble_input.so)
 
 clean:
 	rm -rf target
diff --git a/ruby-to-rust/Makefile b/ruby-to-rust/Makefile
index 582f0ca..a39306a 100644
--- a/ruby-to-rust/Makefile
+++ b/ruby-to-rust/Makefile
@@ -1,9 +1,15 @@
+ifeq ($(shell uname),Darwin)
+    EXT := dylib
+else
+    EXT := so
+endif
+
 all: target/libdouble_input.so
 	ruby src/main.rb
 
 target/libdouble_input.so: src/lib.rs Cargo.toml
 	cargo build
-	(cd target && ln -nsf debug/libdouble_input-* libdouble_input.so)
+	(cd target && ln -nsf debug/libdouble_input-*$(EXT) libdouble_input.so)
 
 clean:
 	rm -rf target