diff --git a/CMakeLists.txt b/CMakeLists.txt
index ffab72b2..f0b06075 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -119,7 +119,7 @@ find_package(Boost 1.59 COMPONENTS system program_options filesystem date_time R
 
 # Botan -------------------------------------------------------------------------
 
-set(BOTAN_VERSION "botan-1.11" "botan-2")
+set(BOTAN_VERSION "botan-2")
 
 if(APPLE)
 	find_library(BOTAN ${BOTAN_VERSION} $ENV{BOTAN_DIR}/release NO_DEFAULT_PATH)
@@ -157,7 +157,11 @@ elseif(WIN32)
 		set(BOTAN_INCLUDE_DIR "$ENV{BOTAN_DIR}/win64/build/include")
 	endif()
 else()
-	set(BOTAN_INCLUDE_DIR "$ENV{BOTAN_DIR}/build/include")
+	if("${CMAKE_BUILD_TYPE}" STREQUAL "Release")
+		set(BOTAN_INCLUDE_DIR "$ENV{BOTAN_DIR}/release/build/include")
+	else()
+		set(BOTAN_INCLUDE_DIR "$ENV{BOTAN_DIR}/debug/build/include")
+	endif()
 endif()
 
 if(NOT BOTAN_INCLUDE_DIR)
diff --git a/README.md b/README.md
index a9d50553..807ca13c 100644
--- a/README.md
+++ b/README.md
@@ -10,7 +10,7 @@
 * Valgrind 3.9.0 (linux)
 * Clang & LLVM 4.0.1 (doesnt quite work for windows, use unix setup below and skip all the ninja stuff)(installation guide http://clang.llvm.org/docs/LibASTMatchersTutorial.html)
 * Boost 1.59
-* Botan 1.11.34
+* Botan 2.1.0
 
 also something about java, but who knows...
 
@@ -19,7 +19,7 @@ also something about java, but who knows...
 * CXX_TEST_DIR - .../cxxtest-4.3
 * CLANG_DIR - .../clang-llvm
 * BOOST_159_DIR - .../boost_1_59_0
-* BOTAN_DIR - .../Botan-1.11.34
+* BOTAN_DIR - .../Botan-2.1.0
 
 For MacOS and Linux
 * QT_DIR - .../Qt/Qt5.8.0/5.8/<IDE>
@@ -71,7 +71,10 @@ Build release lib in ${BOTAN_DIR}/release
 Build debug lib in ${BOTAN_DIR}/debug
 
 for Mac:
-$ python configure.py --disable-shared --disable-modules=darwin_secrandom
+$ mkdir debug/release
+$ cd debug/release
+$ python ../configure.py --disable-shared --disable-modules=darwin_secrandom (--with-debug-info)
+$ make -j 4
 
 for Linux:
 $ python configure.py --disable-shared