diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8b397c73..2a0f1866 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.2.0)
+cmake_minimum_required(VERSION 3.3.0)
 cmake_policy(SET CMP0048 NEW)
 
 project(libssh VERSION 0.8.0 LANGUAGES C)
diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 31242811..079c62b2 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -1,5 +1,9 @@
 #
 # Build the documentation
 #
-include(UseDoxygen OPTIONAL)
+find_package(Doxygen)
 
+if (DOXYGEN_FOUND)
+    doxygen_add_docs(docs
+                     ${CMAKE_CURRENT_SOURCE_DIR})
+endif()