diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..08c508d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+.vscode/
+build/
+build.*/
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
new file mode 100644
index 0000000..c045ed4
--- /dev/null
+++ b/CMakeLists.txt
@@ -0,0 +1,45 @@
+project (tiny-js)
+cmake_minimum_required (VERSION 2.6)
+
+set (CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} ${CMAKE_CURRENT_SOURCE_DIR}/cmake)
+
+set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall")
+
+if (NOT CMAKE_BUILD_TYPE)
+    set (CMAKE_BUILD_TYPE "Debug")
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -g")
+else()
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -O3")
+endif(NOT CMAKE_BUILD_TYPE)
+
+if (NOT WIN32)
+	include(CheckCXXCompilerFlag)
+	CHECK_CXX_COMPILER_FLAG("-std=c++14" COMPILER_SUPPORTS_CXX14)
+	if(COMPILER_SUPPORTS_CXX14)
+    		set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -Wall")
+	else()
+    		message(FATAL_ERROR "Compiler ${CMAKE_CXX_COMPILER} has no C++14 support.")
+	endif()
+endif(NOT WIN32)
+
+FILE(GLOB TINY_JS_HEADER_FILES
+	${CMAKE_CURRENT_LIST_DIR}/TinyJS.h
+)
+
+FILE(GLOB TINY_JS_SOURCE_FILES
+	${CMAKE_CURRENT_LIST_DIR}/TinyJS.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/TinyJS_Functions.cpp
+    ${CMAKE_CURRENT_LIST_DIR}/TinyJS_MathFunctions.cpp
+)
+
+add_library(tiny-js STATIC ${TINY_JS_HEADER_FILES} ${TINY_JS_SOURCE_FILES})
+
+ADD_EXECUTABLE(tiny-js-cli Script.cpp ${TINY_JS_SOURCE_FILES})
+
+ADD_EXECUTABLE(tiny-js-tests run_tests.cpp ${TINY_JS_SOURCE_FILES})
+
+add_custom_command(
+	TARGET tiny-js-tests POST_BUILD
+	COMMAND ${CMAKE_COMMAND} -E copy_directory
+			${CMAKE_SOURCE_DIR}/tests
+			${CMAKE_CURRENT_BINARY_DIR}/tests)
\ No newline at end of file
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000..e1cb5be
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2019 Gordon Williams
+
+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.
diff --git a/TinyJS_MathFunctions.cpp b/TinyJS_MathFunctions.cpp
index 1d79882..c155df2 100755
--- a/TinyJS_MathFunctions.cpp
+++ b/TinyJS_MathFunctions.cpp
@@ -188,7 +188,7 @@ void scMathSinh(CScriptVar *c, void *userdata) {
 
 //Math.asinh(a) - returns trig. hyperbolic arcsine of given angle in radians
 void scMathASinh(CScriptVar *c, void *userdata) {
-    scReturnDouble( asinh( scGetDouble("a") ) );
+    scReturnDouble( asinh( (long double)scGetDouble("a") ) );
 }
 
 //Math.cosh(a) - returns trig. hyperbolic cosine of given angle in radians
@@ -198,7 +198,7 @@ void scMathCosh(CScriptVar *c, void *userdata) {
 
 //Math.acosh(a) - returns trig. hyperbolic arccosine of given angle in radians
 void scMathACosh(CScriptVar *c, void *userdata) {
-    scReturnDouble( acosh( scGetDouble("a") ) );
+    scReturnDouble( acosh( (long double)scGetDouble("a") ) );
 }
 
 //Math.tanh(a) - returns trig. hyperbolic tangent of given angle in radians