diff --git a/CMakeLists.txt b/CMakeLists.txt
index 10885827fc..5f4b855a8d 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -1,4 +1,4 @@
-cmake_minimum_required(VERSION 3.5)
+cmake_minimum_required(VERSION 3.15)
 include(CheckSymbolExists)
 
 if(NOT CMAKE_BUILD_TYPE)
diff --git a/README.md b/README.md
index 70b9f2f964..51c39f0796 100644
--- a/README.md
+++ b/README.md
@@ -47,7 +47,7 @@ mechanism supports that use case too (i.e. `/usr/bin/zig` and `/usr/lib/zig/`).
 
 Ensure you have the required dependencies:
 
- * CMake >= 3.5
+ * CMake >= 3.15
  * System C/C++ Toolchain
  * LLVM, Clang, LLD development libraries == 18.x