diff --git a/CMakeLists.txt b/CMakeLists.txt
index 152bf9318..27403fbc8 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.15)
+cmake_minimum_required(VERSION 3.18)
 project(cpr VERSION 1.14.1 LANGUAGES CXX)
 
 math(EXPR cpr_VERSION_NUM "${cpr_VERSION_MAJOR} * 0x10000 + ${cpr_VERSION_MINOR} * 0x100 + ${cpr_VERSION_PATCH}" OUTPUT_FORMAT HEXADECIMAL)
@@ -384,8 +384,8 @@ if(CPR_BUILD_TESTS)
     FetchContent_Declare(mongoose 
                          URL                    https://github.com/cesanta/mongoose/archive/7.7.tar.gz
                          URL_HASH               SHA256=4e5733dae31c3a81156af63ca9aa3a6b9b736547f21f23c3ab2f8e3f1ecc16c0 # the hash for 7.7.tar.gz
-                         USES_TERMINAL_DOWNLOAD TRUE)   # <---- This is needed only for Ninja to show download progress
-    # We can not use FetchContent_MakeAvailable, since we need to patch mongoose to use CMake
+                         USES_TERMINAL_DOWNLOAD TRUE # This is needed only for Ninja to show download progress
+                         SOURCE_SUBDIR          "?") # Nonexistent directory to prevent FetchContent_MakeAvailable from calling add_subdirectory and duplicating the mongoose target
     if (NOT mongoose_POPULATED)
         FetchContent_MakeAvailable(mongoose)