diff --git a/CMakeLists.txt b/CMakeLists.txt
index e3bda49..3ef4589 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,5 +1,5 @@
 # Observable Library
-# Copyright (C) 2016-2018 David Capello
+# Copyright (C) 2016-2021 David Capello
 
 cmake_minimum_required(VERSION 3.2)
 
@@ -10,13 +10,12 @@ option(OBSERVABLE_BENCHMARKS "Compile observable benchmarks" OFF)
 set(CMAKE_CXX_STANDARD 11)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-include_directories(.)
-
 if(UNIX AND NOT APPLE)
   set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -pthread")
 endif()
 
 add_library(obs obs/connection.cpp)
+target_include_directories(obs PUBLIC .)
 
 if(OBSERVABLE_TESTS)
   enable_testing()