diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0d73463..698b15e 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -12,6 +12,7 @@ set(CMAKE_CXX_EXTENSIONS OFF)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 add_compile_definitions(PLATFORM_CPU_SISD)
+set(CMAKE_CXX_FLAGS "-O3 -Wall -march=native -mtune=native")
 
 # download external libraries
 include(FetchContent)
diff --git a/README.md b/README.md
index 346f1eb..8ac4e15 100755
--- a/README.md
+++ b/README.md
@@ -6,8 +6,7 @@
 
 <p align="center">
   <picture>
-    <source media="(prefers-color-scheme: dark)" srcset="https://www.cda.cit.tum.de/research/microfluidics/logo-microfluidics-toolkit.png" width="60%">
-    <img src="images/mmft_dark.png" width="60%">
+    <img src="https://www.cda.cit.tum.de/research/microfluidics/logo-microfluidics-toolkit.png" width="60%">
   </picture>
 </p>