diff --git a/CurtaSim.xcodeproj/project.pbxproj b/CurtaSim.xcodeproj/project.pbxproj
index 2982025..58edd5c 100644
--- a/CurtaSim.xcodeproj/project.pbxproj
+++ b/CurtaSim.xcodeproj/project.pbxproj
@@ -64,6 +64,7 @@
 		9D24618F20D8B30C00227E1D /* curta.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = curta.c; sourceTree = "<group>"; };
 		9D24619020D8B30C00227E1D /* joystick.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = joystick.h; sourceTree = "<group>"; };
 		9D24619120D8B30C00227E1D /* curtaUI.c */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.c; path = curtaUI.c; sourceTree = "<group>"; };
+		9D65A1BF20DCA472004268B7 /* LICENSE */ = {isa = PBXFileReference; lastKnownFileType = text; path = LICENSE; sourceTree = "<group>"; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -83,6 +84,7 @@
 			children = (
 				9D24618920D8B2C000227E1D /* curta.png */,
 				9D24618A20D8B2C000227E1D /* README.md */,
+				9D65A1BF20DCA472004268B7 /* LICENSE */,
 				9D24616820D8B2AE00227E1D /* CurtaSim */,
 				9D24616720D8B2AE00227E1D /* Products */,
 			);
diff --git a/CurtaSim.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate b/CurtaSim.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate
index ab57f3d..acc0024 100644
Binary files a/CurtaSim.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate and b/CurtaSim.xcodeproj/project.xcworkspace/xcuserdata/jrand.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..71b9c9b
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2018 Jeremy Rand
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.