diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9c0e50a93..867560ae0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -11,7 +11,7 @@
 # To redistribute this file separately, substitute the full license texts
 # for the above references.
 
-cmake_minimum_required (VERSION 2.8.9)
+cmake_minimum_required (VERSION 2.8.7)
 project (openclonk CXX C)
 
 # CMP0054: Only interpret if() arguments as variables or keywords when unquoted
diff --git a/cmake/FindAudio.cmake b/cmake/FindAudio.cmake
index 16eb9b5e0..c3833ae68 100644
--- a/cmake/FindAudio.cmake
+++ b/cmake/FindAudio.cmake
@@ -16,9 +16,9 @@
 macro(__FINDAUDIO_FINDOPENAL)
 	find_package(PkgConfig QUIET)
 	if(PKG_CONFIG_FOUND AND NOT(APPLE))
-		pkg_check_modules(OpenAL "openal>=1.15.1")
+		pkg_check_modules(OpenAL "openal>=1.13")
 		pkg_check_modules(Alut "freealut>=1.1.0")
-		pkg_check_modules(OggVorbis "vorbisfile>=1.3.2" "vorbis>=1.3.2" "ogg>=1.3.0")
+		pkg_check_modules(OggVorbis "vorbisfile>=1.3.2" "vorbis>=1.3.2" "ogg>=1.2.2")
 	else()
 		if(MSVC OR APPLE)
 			find_path(OpenAL_INCLUDE_DIRS al.h PATH_SUFFIXES include/AL include/OpenAL include OpenAL)
@@ -57,7 +57,7 @@ endmacro()
 macro(__FINDAUDIO_FINDSDLMIXER)
 	find_package(PkgConfig QUIET)
 	if(PKG_CONFIG_FOUND)
-		pkg_check_modules(SDLMixer "SDL_mixer>=1.2.12")
+		pkg_check_modules(SDLMixer "SDL_mixer>=1.2.11")
 	endif()
 endmacro()