diff --git a/es/CMakeLists.txt b/es/CMakeLists.txt
index aa11477..1f38cea 100644
--- a/es/CMakeLists.txt
+++ b/es/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 2.8)
+cmake_minimum_required(VERSION 2.8.12)
 
 set(CMAKE_TOOLCHAIN_FILE cmake/ArduinoToolchain.cmake)
 
@@ -7,3 +7,4 @@ Project(es C CXX)
 add_subdirectory(blatt1)
 add_subdirectory(blatt2)
 add_subdirectory(blatt3)
+add_subdirectory(blatt4)
diff --git a/es/blatt3/CMakeLists.txt b/es/blatt3/CMakeLists.txt
index e6d8810..6132968 100644
--- a/es/blatt3/CMakeLists.txt
+++ b/es/blatt3/CMakeLists.txt
@@ -3,15 +3,16 @@ set(ARDUINO_DEFAULT_PORT /dev/ttyUSB0) # Default Port, when not specified
 
 generate_arduino_firmware(uebung3-1
     SKETCH uebung3-1
-    PROGRAMMER usbtinyisp
-    NO_AUTOLIBS)
+    PROGRAMMER usbtinyisp)
 
 generate_arduino_firmware(uebung3-2
     SKETCH uebung3-2
-    PROGRAMMER usbtinyisp
-    NO_AUTOLIBS)
+    PROGRAMMER usbtinyisp)
 
 generate_arduino_firmware(uebung3-3
     SKETCH uebung3-3
-    PROGRAMMER usbtinyisp
-    NO_AUTOLIBS)
+    PROGRAMMER usbtinyisp)
+
+generate_arduino_firmware(uebung3-4
+    SKETCH uebung3-4
+    PROGRAMMER usbtinyisp)
diff --git a/es/blatt4/CMakeLists.txt b/es/blatt4/CMakeLists.txt
new file mode 100644
index 0000000..9fa58a4
--- /dev/null
+++ b/es/blatt4/CMakeLists.txt
@@ -0,0 +1,6 @@
+set(ARDUINO_DEFAULT_BOARD diecimila) # Default Board ID, when not specified
+set(ARDUINO_DEFAULT_PORT /dev/ttyUSB0) # Default Port, when not specified
+
+generate_arduino_firmware(uebung4-1
+    SKETCH uebung4-1
+    PROGRAMMER usbtinyisp)
diff --git a/es/cmake/Platform/Arduino.cmake b/es/cmake/Platform/Arduino.cmake
index 042a3c1..047aed8 100644
--- a/es/cmake/Platform/Arduino.cmake
+++ b/es/cmake/Platform/Arduino.cmake
@@ -282,7 +282,7 @@
 # License, v. 2.0. If a copy of the MPL was not distributed with this file,
 # You can obtain one at http://mozilla.org/MPL/2.0/.
 #=============================================================================#
-cmake_minimum_required(VERSION 2.8.5)
+cmake_minimum_required(VERSION 2.8.12)
 include(CMakeParseArguments)