diff --git a/install.sh b/install.sh
index 7c330d8..5b3639a 100755
--- a/install.sh
+++ b/install.sh
@@ -15,7 +15,8 @@ mv cppipe ${PREFIX}/bin
 # Install headers
 mkdir -p ${PREFIX}/include/cppipe
 cp basicTypes.h commands.hpp commands.inl childProcess.hpp childProcess.inl ${PREFIX}/include/cppipe
-chmod 644 ${PREFIX}/include/cppipe
+chmod 755 ${PREFIX}/include/cppipe
+chmod 644 ${PREFIX}/include/cppipe/*
 
 # Clear old cache
 rm -rf ~/.cache/cppipe ${XDG_CACHE_HOME}/cppipe